672979381 has 2 divisors, whose sum is σ = 672979382. Its totient is φ = 672979380.

The previous prime is 672979343. The next prime is 672979399. The reversal of 672979381 is 183979276.

672979381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362902500 + 310076881 = 19050^2 + 17609^2 .

It is a cyclic number.

It is not a de Polignac number, because 672979381 - 2⁹ = 672978869 is a prime.

It is a super-2 number, since 2×672979381² = 905802494502286322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672979301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336489690 + 336489691.

It is an arithmetic number, because the mean of its divisors is an integer number (336489691).

Almost surely, 2^672979381 is an apocalyptic number.

It is an amenable number.

672979381 is a deficient number, since it is larger than the sum of its proper divisors (1).

672979381 is an equidigital number, since it uses as much as digits as its factorization.

672979381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 52.

The square root of 672979381 is about 25941.8461370813. The cubic root of 672979381 is about 876.3291390689.

The spelling of 672979381 in words is "six hundred seventy-two million, nine hundred seventy-nine thousand, three hundred eighty-one".