726431 has 2 divisors, whose sum is σ = 726432. Its totient is φ = 726430.

The previous prime is 726419. The next prime is 726457. The reversal of 726431 is 134627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 726431 - 2⁶ = 726367 is a prime.

It is a super-2 number, since 2×726431² = 1055403995522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 726397 and 726406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363215 + 363216.

It is an arithmetic number, because the mean of its divisors is an integer number (363216).

2⁷²⁶⁴³¹ is an apocalyptic number.

726431 is a deficient number, since it is larger than the sum of its proper divisors (1).

726431 is an equidigital number, since it uses as much as digits as its factorization.

726431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 23.

The square root of 726431 is about 852.3092161886. The cubic root of 726431 is about 89.8941554055.

The spelling of 726431 in words is "seven hundred twenty-six thousand, four hundred thirty-one".