655632749 has 2 divisors, whose sum is σ = 655632750. Its totient is φ = 655632748.

The previous prime is 655632707. The next prime is 655632793. The reversal of 655632749 is 947236556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 590830249 + 64802500 = 24307^2 + 8050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655632749 is a prime.

It is a super-2 number, since 2×655632749² = 859708603122594002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655632049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327816374 + 327816375.

It is an arithmetic number, because the mean of its divisors is an integer number (327816375).

Almost surely, 2^655632749 is an apocalyptic number.

It is an amenable number.

655632749 is a deficient number, since it is larger than the sum of its proper divisors (1).

655632749 is an equidigital number, since it uses as much as digits as its factorization.

655632749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 47.

The square root of 655632749 is about 25605.3265747578. The cubic root of 655632749 is about 868.7341210354.

The spelling of 655632749 in words is "six hundred fifty-five million, six hundred thirty-two thousand, seven hundred forty-nine".