1149955957 has 4 divisors (see below), whose sum is σ = 1168807756. Its totient is φ = 1131104160.

The previous prime is 1149955949. The next prime is 1149955991. The reversal of 1149955957 is 7595599411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7595599411 = 73 ⋅104049307.

It can be written as a sum of positive squares in 2 ways, for example, as 37466641 + 1112489316 = 6121^2 + 33354^2 .

It is a cyclic number.

It is not a de Polignac number, because 1149955957 - 2³ = 1149955949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1149955898 and 1149955907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149955657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9425808 + ... + 9425929.

It is an arithmetic number, because the mean of its divisors is an integer number (292201939).

Almost surely, 2^1149955957 is an apocalyptic number.

It is an amenable number.

1149955957 is a deficient number, since it is larger than the sum of its proper divisors (18851799).

1149955957 is an equidigital number, since it uses as much as digits as its factorization.

1149955957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18851798.

The product of its digits is 2551500, while the sum is 55.

The square root of 1149955957 is about 33911.0005308012. Note that the first 3 decimals coincide. The cubic root of 1149955957 is about 1047.6761781050.

The spelling of 1149955957 in words is "one billion, one hundred forty-nine million, nine hundred fifty-five thousand, nine hundred fifty-seven".