652783891 has 2 divisors, whose sum is σ = 652783892. Its totient is φ = 652783890.

The previous prime is 652783889. The next prime is 652783913. The reversal of 652783891 is 198387256.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 652783891 - 2¹ = 652783889 is a prime.

It is a super-2 number, since 2×652783891² = 852253616698199762, which contains 22 as substring.

Together with 652783889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (652753891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326391945 + 326391946.

It is an arithmetic number, because the mean of its divisors is an integer number (326391946).

Almost surely, 2^652783891 is an apocalyptic number.

652783891 is a deficient number, since it is larger than the sum of its proper divisors (1).

652783891 is an equidigital number, since it uses as much as digits as its factorization.

652783891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The square root of 652783891 is about 25549.6358291072. The cubic root of 652783891 is about 867.4740184951.

It can be divided in two parts, 65278 and 3891, that added together give a square (69169 = 263²).

The spelling of 652783891 in words is "six hundred fifty-two million, seven hundred eighty-three thousand, eight hundred ninety-one".