115631437 has 2 divisors, whose sum is σ = 115631438. Its totient is φ = 115631436.

The previous prime is 115631423. The next prime is 115631443. The reversal of 115631437 is 734136511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102191881 + 13439556 = 10109^2 + 3666^2 .

It is an emirp because it is prime and its reverse (734136511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115631437 - 2⁷ = 115631309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 115631399 and 115631408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115631447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57815718 + 57815719.

It is an arithmetic number, because the mean of its divisors is an integer number (57815719).

Almost surely, 2^115631437 is an apocalyptic number.

It is an amenable number.

115631437 is a deficient number, since it is larger than the sum of its proper divisors (1).

115631437 is an equidigital number, since it uses as much as digits as its factorization.

115631437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 31.

The square root of 115631437 is about 10753.2058940578. The cubic root of 115631437 is about 487.1828304670.

Adding to 115631437 its reverse (734136511), we get a palindrome (849767948).

The spelling of 115631437 in words is "one hundred fifteen million, six hundred thirty-one thousand, four hundred thirty-seven".