62891561 has 2 divisors, whose sum is σ = 62891562. Its totient is φ = 62891560.

The previous prime is 62891537. The next prime is 62891567. The reversal of 62891561 is 16519826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40386025 + 22505536 = 6355^2 + 4744^2 .

It is a cyclic number.

It is not a de Polignac number, because 62891561 - 2²² = 58697257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (62891567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31445780 + 31445781.

It is an arithmetic number, because the mean of its divisors is an integer number (31445781).

Almost surely, 2^62891561 is an apocalyptic number.

It is an amenable number.

62891561 is a deficient number, since it is larger than the sum of its proper divisors (1).

62891561 is an equidigital number, since it uses as much as digits as its factorization.

62891561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 38.

The square root of 62891561 is about 7930.4199762686. The cubic root of 62891561 is about 397.6772907438.

The spelling of 62891561 in words is "sixty-two million, eight hundred ninety-one thousand, five hundred sixty-one".