652639879 has 2 divisors, whose sum is σ = 652639880. Its totient is φ = 652639878.

The previous prime is 652639861. The next prime is 652639891. The reversal of 652639879 is 978936256.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 652639879 - 2¹³ = 652631687 is a prime.

It is a super-2 number, since 2×652639879² = 851877623322269282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652639849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326319939 + 326319940.

It is an arithmetic number, because the mean of its divisors is an integer number (326319940).

Almost surely, 2^652639879 is an apocalyptic number.

652639879 is a deficient number, since it is larger than the sum of its proper divisors (1).

652639879 is an equidigital number, since it uses as much as digits as its factorization.

652639879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 55.

The square root of 652639879 is about 25546.8173947363. The cubic root of 652639879 is about 867.4102220595.

The spelling of 652639879 in words is "six hundred fifty-two million, six hundred thirty-nine thousand, eight hundred seventy-nine".