62640091 has 2 divisors, whose sum is σ = 62640092. Its totient is φ = 62640090.

The previous prime is 62640089. The next prime is 62640133. The reversal of 62640091 is 19004626.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 62640091 - 2¹ = 62640089 is a prime.

Together with 62640089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (62640691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31320045 + 31320046.

It is an arithmetic number, because the mean of its divisors is an integer number (31320046).

Almost surely, 2^62640091 is an apocalyptic number.

62640091 is a deficient number, since it is larger than the sum of its proper divisors (1).

62640091 is an equidigital number, since it uses as much as digits as its factorization.

62640091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 62640091 is about 7914.5493238718. The cubic root of 62640091 is about 397.1465491991.

The spelling of 62640091 in words is "sixty-two million, six hundred forty thousand, ninety-one".