749991 has 8 divisors (see below), whose sum is σ = 1090944. Its totient is φ = 454520.

The previous prime is 749971. The next prime is 749993. The reversal of 749991 is 199947.

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

It is not a de Polignac number, because 749991 - 2⁶ = 749927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749993) 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, 11331 + ... + 11396.

It is an arithmetic number, because the mean of its divisors is an integer number (136368).

2⁷⁴⁹⁹⁹¹ is an apocalyptic number.

749991 is a deficient number, since it is larger than the sum of its proper divisors (340953).

749991 is a wasteful number, since it uses less digits than its factorization.

749991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22741.

The product of its digits is 20412, while the sum is 39.

The square root of 749991 is about 866.0202076164. The cubic root of 749991 is about 90.8556662160.

The spelling of 749991 in words is "seven hundred forty-nine thousand, nine hundred ninety-one".