744721431 has 8 divisors (see below), whose sum is σ = 1051371504. Its totient is φ = 467276160.

The previous prime is 744721427. The next prime is 744721513. The reversal of 744721431 is 134127447.

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

It is not a de Polignac number, because 744721431 - 2² = 744721427 is a prime.

It is a super-2 number, since 2×744721431² = 1109220019581375522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 744721392 and 744721401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744721031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7301140 + ... + 7301241.

It is an arithmetic number, because the mean of its divisors is an integer number (131421438).

Almost surely, 2^744721431 is an apocalyptic number.

744721431 is a deficient number, since it is larger than the sum of its proper divisors (306650073).

744721431 is a wasteful number, since it uses less digits than its factorization.

744721431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14602401.

The product of its digits is 18816, while the sum is 33.

The square root of 744721431 is about 27289.5846615517. The cubic root of 744721431 is about 906.4237658648.

Adding to 744721431 its reverse (134127447), we get a palindrome (878848878).

The spelling of 744721431 in words is "seven hundred forty-four million, seven hundred twenty-one thousand, four hundred thirty-one".