672454217 has 2 divisors, whose sum is σ = 672454218. Its totient is φ = 672454216.

The previous prime is 672454199. The next prime is 672454219. The reversal of 672454217 is 712454276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 506070016 + 166384201 = 22496^2 + 12899^2 .

It is a cyclic number.

It is not a de Polignac number, because 672454217 - 2⁸ = 672453961 is a prime.

It is a super-2 number, since 2×672454217² = 904389347922166178, which contains 22 as substring.

Together with 672454219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (672454219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336227108 + 336227109.

It is an arithmetic number, because the mean of its divisors is an integer number (336227109).

Almost surely, 2^672454217 is an apocalyptic number.

It is an amenable number.

672454217 is a deficient number, since it is larger than the sum of its proper divisors (1).

672454217 is an equidigital number, since it uses as much as digits as its factorization.

672454217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 38.

The square root of 672454217 is about 25931.7222143073. The cubic root of 672454217 is about 876.1011299640.

The spelling of 672454217 in words is "six hundred seventy-two million, four hundred fifty-four thousand, two hundred seventeen".