654162491 has 2 divisors, whose sum is σ = 654162492. Its totient is φ = 654162490.

The previous prime is 654162469. The next prime is 654162529. The reversal of 654162491 is 194261456.

It is an a-pointer prime, because the next prime (654162529) can be obtained adding 654162491 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 654162491 - 2²⁶ = 587053627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (654162401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327081245 + 327081246.

It is an arithmetic number, because the mean of its divisors is an integer number (327081246).

Almost surely, 2^654162491 is an apocalyptic number.

654162491 is a deficient number, since it is larger than the sum of its proper divisors (1).

654162491 is an equidigital number, since it uses as much as digits as its factorization.

654162491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 654162491 is about 25576.6004582313. The cubic root of 654162491 is about 868.0842555735.

The spelling of 654162491 in words is "six hundred fifty-four million, one hundred sixty-two thousand, four hundred ninety-one".