652981 has 4 divisors (see below), whose sum is σ = 746272. Its totient is φ = 559692.

The previous prime is 652969. The next prime is 652991. The reversal of 652981 is 189256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 652981 - 2⁷ = 652853 is a prime.

It is a super-2 number, since 2×652981² = 852768372722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46635 + ... + 46648.

It is an arithmetic number, because the mean of its divisors is an integer number (186568).

2⁶⁵²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

652981 is a deficient number, since it is larger than the sum of its proper divisors (93291).

652981 is an equidigital number, since it uses as much as digits as its factorization.

652981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93290.

The product of its digits is 4320, while the sum is 31.

The square root of 652981 is about 808.0723977466. The cubic root of 652981 is about 86.7561321369.

The spelling of 652981 in words is "six hundred fifty-two thousand, nine hundred eighty-one".