654664253 has 2 divisors, whose sum is σ = 654664254. Its totient is φ = 654664252.

The previous prime is 654664217. The next prime is 654664267. The reversal of 654664253 is 352466456.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529828324 + 124835929 = 23018^2 + 11173^2 .

It is a cyclic number.

It is not a de Polignac number, because 654664253 - 2²² = 650469949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 654664253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654666253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327332126 + 327332127.

It is an arithmetic number, because the mean of its divisors is an integer number (327332127).

Almost surely, 2^654664253 is an apocalyptic number.

It is an amenable number.

654664253 is a deficient number, since it is larger than the sum of its proper divisors (1).

654664253 is an equidigital number, since it uses as much as digits as its factorization.

654664253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 41.

The square root of 654664253 is about 25586.4075829336. The cubic root of 654664253 is about 868.3061476264.

The spelling of 654664253 in words is "six hundred fifty-four million, six hundred sixty-four thousand, two hundred fifty-three".