672431129 has 2 divisors, whose sum is σ = 672431130. Its totient is φ = 672431128.

The previous prime is 672431117. The next prime is 672431183. The reversal of 672431129 is 921134276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 661672729 + 10758400 = 25723^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 672431129 - 2¹² = 672427033 is a prime.

It is not a weakly prime, because it can be changed into another prime (672431429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336215564 + 336215565.

It is an arithmetic number, because the mean of its divisors is an integer number (336215565).

Almost surely, 2^672431129 is an apocalyptic number.

It is an amenable number.

672431129 is a deficient number, since it is larger than the sum of its proper divisors (1).

672431129 is an equidigital number, since it uses as much as digits as its factorization.

672431129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 672431129 is about 25931.2770414417. The cubic root of 672431129 is about 876.0911031825.

The spelling of 672431129 in words is "six hundred seventy-two million, four hundred thirty-one thousand, one hundred twenty-nine".