726172431 has 8 divisors (see below), whose sum is σ = 975621504. Its totient is φ = 480419160.

The previous prime is 726172429. The next prime is 726172481. The reversal of 726172431 is 134271627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 726172431 - 2¹ = 726172429 is a prime.

It is a super-2 number, since 2×726172431² = 1054652799088899522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 726172392 and 726172401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726172481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923491 + ... + 924276.

It is an arithmetic number, because the mean of its divisors is an integer number (121952688).

Almost surely, 2^726172431 is an apocalyptic number.

726172431 is a deficient number, since it is larger than the sum of its proper divisors (249449073).

726172431 is a wasteful number, since it uses less digits than its factorization.

726172431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847901.

The product of its digits is 14112, while the sum is 33.

The square root of 726172431 is about 26947.5867379623. The cubic root of 726172431 is about 898.8348836800.

The spelling of 726172431 in words is "seven hundred twenty-six million, one hundred seventy-two thousand, four hundred thirty-one".