726172423 has 2 divisors, whose sum is σ = 726172424. Its totient is φ = 726172422.

The previous prime is 726172409. The next prime is 726172429. The reversal of 726172423 is 324271627.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726172423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726172429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363086211 + 363086212.

It is an arithmetic number, because the mean of its divisors is an integer number (363086212).

Almost surely, 2^726172423 is an apocalyptic number.

726172423 is a deficient number, since it is larger than the sum of its proper divisors (1).

726172423 is an equidigital number, since it uses as much as digits as its factorization.

726172423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 34.

The square root of 726172423 is about 26947.5865895260. The cubic root of 726172423 is about 898.8348803793.

The spelling of 726172423 in words is "seven hundred twenty-six million, one hundred seventy-two thousand, four hundred twenty-three".