655672001 has 2 divisors, whose sum is σ = 655672002. Its totient is φ = 655672000.

The previous prime is 655671953. The next prime is 655672013. The reversal of 655672001 is 100276556.

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., 643941376 + 11730625 = 25376^2 + 3425^2 .

It is a cyclic number.

It is not a de Polignac number, because 655672001 - 2⁶ = 655671937 is a prime.

It is a Chen prime.

It is equal to p_34072772 and since 655672001 and 34072772 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (655672051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327836000 + 327836001.

It is an arithmetic number, because the mean of its divisors is an integer number (327836001).

Almost surely, 2^655672001 is an apocalyptic number.

It is an amenable number.

655672001 is a deficient number, since it is larger than the sum of its proper divisors (1).

655672001 is an equidigital number, since it uses as much as digits as its factorization.

655672001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 655672001 is about 25606.0930444299. The cubic root of 655672001 is about 868.7514574031.

The spelling of 655672001 in words is "six hundred fifty-five million, six hundred seventy-two thousand, one".