672459421 has 2 divisors, whose sum is σ = 672459422. Its totient is φ = 672459420.

The previous prime is 672459397. The next prime is 672459433. The reversal of 672459421 is 124954276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595896921 + 76562500 = 24411^2 + 8750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672459421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672459461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336229710 + 336229711.

It is an arithmetic number, because the mean of its divisors is an integer number (336229711).

Almost surely, 2^672459421 is an apocalyptic number.

It is an amenable number.

672459421 is a deficient number, since it is larger than the sum of its proper divisors (1).

672459421 is an equidigital number, since it uses as much as digits as its factorization.

672459421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 672459421 is about 25931.8225545371. The cubic root of 672459421 is about 876.1033899535.

The spelling of 672459421 in words is "six hundred seventy-two million, four hundred fifty-nine thousand, four hundred twenty-one".