749961669 has 4 divisors (see below), whose sum is σ = 999948896. Its totient is φ = 499974444.

The previous prime is 749961661. The next prime is 749961679. The reversal of 749961669 is 966169947.

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 not a de Polignac number, because 749961669 - 2³ = 749961661 is a prime.

It is a super-2 number, since 2×749961669² = 1124885009938531122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749961661) 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, 124993609 + ... + 124993614.

It is an arithmetic number, because the mean of its divisors is an integer number (249987224).

Almost surely, 2^749961669 is an apocalyptic number.

It is an amenable number.

749961669 is a deficient number, since it is larger than the sum of its proper divisors (249987227).

749961669 is a wasteful number, since it uses less digits than its factorization.

749961669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249987226.

The product of its digits is 4408992, while the sum is 57.

The square root of 749961669 is about 27385.4280412047. The cubic root of 749961669 is about 908.5448179192.

The spelling of 749961669 in words is "seven hundred forty-nine million, nine hundred sixty-one thousand, six hundred sixty-nine".