62617991 has 4 divisors (see below), whose sum is σ = 62704152. Its totient is φ = 62531832.

The previous prime is 62617981. The next prime is 62618009. The reversal of 62617991 is 19971626.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 62617991 - 2⁶ = 62617927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (62617921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41981 + ... + 43446.

It is an arithmetic number, because the mean of its divisors is an integer number (15676038).

Almost surely, 2^62617991 is an apocalyptic number.

62617991 is a deficient number, since it is larger than the sum of its proper divisors (86161).

62617991 is an equidigital number, since it uses as much as digits as its factorization.

62617991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86160.

The product of its digits is 40824, while the sum is 41.

The square root of 62617991 is about 7913.1530378225. The cubic root of 62617991 is about 397.0998380540.

The spelling of 62617991 in words is "sixty-two million, six hundred seventeen thousand, nine hundred ninety-one".