652639891 has 2 divisors, whose sum is σ = 652639892. Its totient is φ = 652639890.

The previous prime is 652639879. The next prime is 652639903. The reversal of 652639891 is 198936256.

It is a balanced prime because it is at equal distance from previous prime (652639879) and next prime (652639903).

It is a cyclic number.

It is not a de Polignac number, because 652639891 - 2⁵ = 652639859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (652639861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326319945 + 326319946.

It is an arithmetic number, because the mean of its divisors is an integer number (326319946).

Almost surely, 2^652639891 is an apocalyptic number.

652639891 is a deficient number, since it is larger than the sum of its proper divisors (1).

652639891 is an equidigital number, since it uses as much as digits as its factorization.

652639891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 49.

The square root of 652639891 is about 25546.8176295992. The cubic root of 652639891 is about 867.4102273759.

The spelling of 652639891 in words is "six hundred fifty-two million, six hundred thirty-nine thousand, eight hundred ninety-one".