652991 has 2 divisors, whose sum is σ = 652992. Its totient is φ = 652990.

The previous prime is 652969. The next prime is 652997. The reversal of 652991 is 199256.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-652991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326495 + 326496.

It is an arithmetic number, because the mean of its divisors is an integer number (326496).

2⁶⁵²⁹⁹¹ is an apocalyptic number.

652991 is a deficient number, since it is larger than the sum of its proper divisors (1).

652991 is an equidigital number, since it uses as much as digits as its factorization.

652991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 32.

The square root of 652991 is about 808.0785852873. The cubic root of 652991 is about 86.7565750068.

The spelling of 652991 in words is "six hundred fifty-two thousand, nine hundred ninety-one".