1534155949 has 4 divisors (see below), whose sum is σ = 1534406940. Its totient is φ = 1533904960.

The previous prime is 1534155943. The next prime is 1534155971. The reversal of 1534155949 is 9495514351.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171217225 + 1362938724 = 13085^2 + 36918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1534155949 - 2¹³ = 1534147757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1534155899 and 1534155908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1534155943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116092 + ... + 128629.

It is an arithmetic number, because the mean of its divisors is an integer number (383601735).

Almost surely, 2^1534155949 is an apocalyptic number.

It is an amenable number.

1534155949 is a deficient number, since it is larger than the sum of its proper divisors (250991).

1534155949 is an equidigital number, since it uses as much as digits as its factorization.

1534155949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250990.

The product of its digits is 486000, while the sum is 46.

The square root of 1534155949 is about 39168.3028608593. The cubic root of 1534155949 is about 1153.3377383993.

The spelling of 1534155949 in words is "one billion, five hundred thirty-four million, one hundred fifty-five thousand, nine hundred forty-nine".