749316421 has 4 divisors (see below), whose sum is σ = 856361632. Its totient is φ = 642271212.

The previous prime is 749316419. The next prime is 749316439. The reversal of 749316421 is 124613947.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 749316421 - 2¹ = 749316419 is a prime.

It is a super-2 number, since 2×749316421² = 1122950197560498482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749316401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53522595 + ... + 53522608.

It is an arithmetic number, because the mean of its divisors is an integer number (214090408).

Almost surely, 2^749316421 is an apocalyptic number.

It is an amenable number.

749316421 is a deficient number, since it is larger than the sum of its proper divisors (107045211).

749316421 is a wasteful number, since it uses less digits than its factorization.

749316421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107045210.

The product of its digits is 36288, while the sum is 37.

The square root of 749316421 is about 27373.6446422467. The cubic root of 749316421 is about 908.2841801830.

The spelling of 749316421 in words is "seven hundred forty-nine million, three hundred sixteen thousand, four hundred twenty-one".