672991043 has 2 divisors, whose sum is σ = 672991044. Its totient is φ = 672991042.

The previous prime is 672991013. The next prime is 672991051. The reversal of 672991043 is 340199276.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 672991043 - 2¹⁶ = 672925507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (672991013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336495521 + 336495522.

It is an arithmetic number, because the mean of its divisors is an integer number (336495522).

Almost surely, 2^672991043 is an apocalyptic number.

672991043 is a deficient number, since it is larger than the sum of its proper divisors (1).

672991043 is an equidigital number, since it uses as much as digits as its factorization.

672991043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 672991043 is about 25942.0709080829. The cubic root of 672991043 is about 876.3342009830.

The spelling of 672991043 in words is "six hundred seventy-two million, nine hundred ninety-one thousand, forty-three".