231679537 has 2 divisors, whose sum is σ = 231679538. Its totient is φ = 231679536.

The previous prime is 231679507. The next prime is 231679541. The reversal of 231679537 is 735976132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231526656 + 152881 = 15216^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 231679537 - 2¹⁵ = 231646769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231679493 and 231679502.

It is not a weakly prime, because it can be changed into another prime (231679507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115839768 + 115839769.

It is an arithmetic number, because the mean of its divisors is an integer number (115839769).

Almost surely, 2^231679537 is an apocalyptic number.

It is an amenable number.

231679537 is a deficient number, since it is larger than the sum of its proper divisors (1).

231679537 is an equidigital number, since it uses as much as digits as its factorization.

231679537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 43.

The square root of 231679537 is about 15221.0228631324. The cubic root of 231679537 is about 614.1803141190.

The spelling of 231679537 in words is "two hundred thirty-one million, six hundred seventy-nine thousand, five hundred thirty-seven".