11387952731 has 2 divisors, whose sum is σ = 11387952732. Its totient is φ = 11387952730.

The previous prime is 11387952691. The next prime is 11387952733. The reversal of 11387952731 is 13725978311.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13725978311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11387952731 - 2²² = 11383758427 is a prime.

It is a super-2 number, since 2×11387952731² (a number of 21 digits) contains 22 as substring.

Together with 11387952733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11387952733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5693976365 + 5693976366.

It is an arithmetic number, because the mean of its divisors is an integer number (5693976366).

Almost surely, 2^11387952731 is an apocalyptic number.

11387952731 is a deficient number, since it is larger than the sum of its proper divisors (1).

11387952731 is an equidigital number, since it uses as much as digits as its factorization.

11387952731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 47.

The spelling of 11387952731 in words is "eleven billion, three hundred eighty-seven million, nine hundred fifty-two thousand, seven hundred thirty-one".