672552421 has 2 divisors, whose sum is σ = 672552422. Its totient is φ = 672552420.

The previous prime is 672552343. The next prime is 672552467. The reversal of 672552421 is 124255276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525051396 + 147501025 = 22914^2 + 12145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672552421 is a prime.

It is a super-2 number, since 2×672552421² = 904653517985922482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672552721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336276210 + 336276211.

It is an arithmetic number, because the mean of its divisors is an integer number (336276211).

Almost surely, 2^672552421 is an apocalyptic number.

It is an amenable number.

672552421 is a deficient number, since it is larger than the sum of its proper divisors (1).

672552421 is an equidigital number, since it uses as much as digits as its factorization.

672552421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 34.

The square root of 672552421 is about 25933.6156561325. The cubic root of 672552421 is about 876.1437759639.

The spelling of 672552421 in words is "six hundred seventy-two million, five hundred fifty-two thousand, four hundred twenty-one".