1149440731 has 2 divisors, whose sum is σ = 1149440732. Its totient is φ = 1149440730.

The previous prime is 1149440729. The next prime is 1149440753. The reversal of 1149440731 is 1370449411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1149440731 - 2¹ = 1149440729 is a prime.

It is a super-2 number, since 2×1149440731² = 2642427988163628722, which contains 22 as substring.

Together with 1149440729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1149440231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574720365 + 574720366.

It is an arithmetic number, because the mean of its divisors is an integer number (574720366).

Almost surely, 2^1149440731 is an apocalyptic number.

1149440731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149440731 is an equidigital number, since it uses as much as digits as its factorization.

1149440731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1149440731 is about 33903.4029412978. The cubic root of 1149440731 is about 1047.5196878675.

It can be divided in two parts, 11494 and 40731, that added together give a palindrome (52225).

The spelling of 1149440731 in words is "one billion, one hundred forty-nine million, four hundred forty thousand, seven hundred thirty-one".