653951 has 2 divisors, whose sum is σ = 653952. Its totient is φ = 653950.

The previous prime is 653941. The next prime is 653963. The reversal of 653951 is 159356.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (653941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326975 + 326976.

It is an arithmetic number, because the mean of its divisors is an integer number (326976).

2⁶⁵³⁹⁵¹ is an apocalyptic number.

653951 is a deficient number, since it is larger than the sum of its proper divisors (1).

653951 is an equidigital number, since it uses as much as digits as its factorization.

653951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4050, while the sum is 29.

The square root of 653951 is about 808.6723687625. The cubic root of 653951 is about 86.7990694825.

The spelling of 653951 in words is "six hundred fifty-three thousand, nine hundred fifty-one".