673400731 has 2 divisors, whose sum is σ = 673400732. Its totient is φ = 673400730.

The previous prime is 673400723. The next prime is 673400737. The reversal of 673400731 is 137004376.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 673400731 - 2³ = 673400723 is a prime.

It is a super-2 number, since 2×673400731² = 906937089022668722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 673400693 and 673400702.

It is not a weakly prime, because it can be changed into another prime (673400737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336700365 + 336700366.

It is an arithmetic number, because the mean of its divisors is an integer number (336700366).

Almost surely, 2^673400731 is an apocalyptic number.

673400731 is a deficient number, since it is larger than the sum of its proper divisors (1).

673400731 is an equidigital number, since it uses as much as digits as its factorization.

673400731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 673400731 is about 25949.9659151992. The cubic root of 673400731 is about 876.5119897672.

The spelling of 673400731 in words is "six hundred seventy-three million, four hundred thousand, seven hundred thirty-one".