231789196537 has 2 divisors, whose sum is σ = 231789196538. Its totient is φ = 231789196536.

The previous prime is 231789196501. The next prime is 231789196553. The reversal of 231789196537 is 735691987132.

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., 129401356176 + 102387840361 = 359724^2 + 319981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231789196537 is a prime.

It is not a weakly prime, because it can be changed into another prime (231789191537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115894598268 + 115894598269.

It is an arithmetic number, because the mean of its divisors is an integer number (115894598269).

Almost surely, 2^231789196537 is an apocalyptic number.

It is an amenable number.

231789196537 is a deficient number, since it is larger than the sum of its proper divisors (1).

231789196537 is an equidigital number, since it uses as much as digits as its factorization.

231789196537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17146080, while the sum is 61.

The spelling of 231789196537 in words is "two hundred thirty-one billion, seven hundred eighty-nine million, one hundred ninety-six thousand, five hundred thirty-seven".