672140461 has 2 divisors, whose sum is σ = 672140462. Its totient is φ = 672140460.

The previous prime is 672140437. The next prime is 672140471. The reversal of 672140461 is 164041276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 479347236 + 192793225 = 21894^2 + 13885^2 .

It is a cyclic number.

It is not a de Polignac number, because 672140461 - 2¹⁵ = 672107693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672140471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336070230 + 336070231.

It is an arithmetic number, because the mean of its divisors is an integer number (336070231).

Almost surely, 2^672140461 is an apocalyptic number.

It is an amenable number.

672140461 is a deficient number, since it is larger than the sum of its proper divisors (1).

672140461 is an equidigital number, since it uses as much as digits as its factorization.

672140461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 672140461 is about 25925.6718524323. The cubic root of 672140461 is about 875.9648506743.

The spelling of 672140461 in words is "six hundred seventy-two million, one hundred forty thousand, four hundred sixty-one".