749001391 has 8 divisors (see below), whose sum is σ = 773587584. Its totient is φ = 724741080.

The previous prime is 749001367. The next prime is 749001431. The reversal of 749001391 is 193100947.

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

It is a cyclic number.

It is not a de Polignac number, because 749001391 - 2⁵ = 749001359 is a prime.

It is a super-2 number, since 2×749001391² = 1122006167439869762, which contains 22 as substring.

It is a Duffinian number.

749001391 is a modest number, since divided by 1391 gives 749 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749001301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76795 + ... + 85996.

It is an arithmetic number, because the mean of its divisors is an integer number (96698448).

Almost surely, 2^749001391 is an apocalyptic number.

749001391 is a deficient number, since it is larger than the sum of its proper divisors (24586193).

749001391 is a wasteful number, since it uses less digits than its factorization.

749001391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162941.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 749001391 is about 27367.8897798131. The cubic root of 749001391 is about 908.1568744298.

The spelling of 749001391 in words is "seven hundred forty-nine million, one thousand, three hundred ninety-one".