113891537 has 2 divisors, whose sum is σ = 113891538. Its totient is φ = 113891536.

The previous prime is 113891507. The next prime is 113891543. The reversal of 113891537 is 735198311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96510976 + 17380561 = 9824^2 + 4169^2 .

It is an emirp because it is prime and its reverse (735198311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113891537 - 2¹² = 113887441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113891537.

It is not a weakly prime, because it can be changed into another prime (113891507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56945768 + 56945769.

It is an arithmetic number, because the mean of its divisors is an integer number (56945769).

Almost surely, 2^113891537 is an apocalyptic number.

It is an amenable number.

113891537 is a deficient number, since it is larger than the sum of its proper divisors (1).

113891537 is an equidigital number, since it uses as much as digits as its factorization.

113891537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 38.

The square root of 113891537 is about 10671.9977979758. The cubic root of 113891537 is about 484.7269331173.

The spelling of 113891537 in words is "one hundred thirteen million, eight hundred ninety-one thousand, five hundred thirty-seven".