673406731 has 2 divisors, whose sum is σ = 673406732. Its totient is φ = 673406730.

The previous prime is 673406729. The next prime is 673406753. The reversal of 673406731 is 137604376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 673406731 - 2¹ = 673406729 is a prime.

It is a super-2 number, since 2×673406731² = 906953250712212722, which contains 22 as substring.

Together with 673406729, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (673406131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336703365 + 336703366.

It is an arithmetic number, because the mean of its divisors is an integer number (336703366).

Almost surely, 2^673406731 is an apocalyptic number.

673406731 is a deficient number, since it is larger than the sum of its proper divisors (1).

673406731 is an equidigital number, since it uses as much as digits as its factorization.

673406731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 673406731 is about 25950.0815220299. The cubic root of 673406731 is about 876.5145929999.

The spelling of 673406731 in words is "six hundred seventy-three million, four hundred six thousand, seven hundred thirty-one".