751691349 has 12 divisors (see below), whose sum is σ = 1103576812. Its totient is φ = 492912000.

The previous prime is 751691341. The next prime is 751691383. The reversal of 751691349 is 943196157.

751691349 is a `hidden beast` number, since 7 + 516 + 91 + 3 + 49 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 190854225 + 560837124 = 13815^2 + 23682^2 .

It is not a de Polignac number, because 751691349 - 2³ = 751691341 is a prime.

It is a super-2 number, since 2×751691349² = 1130079768322879602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (751691341) 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 11 ways as a sum of consecutive naturals, for example, 684052 + ... + 685149.

Almost surely, 2^751691349 is an apocalyptic number.

It is an amenable number.

751691349 is a deficient number, since it is larger than the sum of its proper divisors (351885463).

751691349 is a wasteful number, since it uses less digits than its factorization.

751691349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369268 (or 1369265 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 751691349 is about 27416.9901520936. The cubic root of 751691349 is about 909.2427581253.

The spelling of 751691349 in words is "seven hundred fifty-one million, six hundred ninety-one thousand, three hundred forty-nine".