63694537 has 2 divisors, whose sum is σ = 63694538. Its totient is φ = 63694536.

The previous prime is 63694523. The next prime is 63694559. The reversal of 63694537 is 73549636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58049161 + 5645376 = 7619^2 + 2376^2 .

It is a cyclic number.

It is not a de Polignac number, because 63694537 - 2⁷ = 63694409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63694493 and 63694502.

It is not a weakly prime, because it can be changed into another prime (63694507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31847268 + 31847269.

It is an arithmetic number, because the mean of its divisors is an integer number (31847269).

Almost surely, 2^63694537 is an apocalyptic number.

It is an amenable number.

63694537 is a deficient number, since it is larger than the sum of its proper divisors (1).

63694537 is an equidigital number, since it uses as much as digits as its factorization.

63694537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 43.

The square root of 63694537 is about 7980.8857277874. The cubic root of 63694537 is about 399.3626036041.

The spelling of 63694537 in words is "sixty-three million, six hundred ninety-four thousand, five hundred thirty-seven".