745587779 has 4 divisors (see below), whose sum is σ = 758224920. Its totient is φ = 732950640.

The previous prime is 745587737. The next prime is 745587823. The reversal of 745587779 is 977785547.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 745587779 - 2⁸ = 745587523 is a prime.

It is a super-2 number, since 2×745587779² = 1111802272388305682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59), and also a Moran number because the ratio is a prime number: 12637081 = 745587779 / (7 + 4 + 5 + 5 + 8 + 7 + 7 + 7 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745580779) 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, 6318482 + ... + 6318599.

It is an arithmetic number, because the mean of its divisors is an integer number (189556230).

Almost surely, 2^745587779 is an apocalyptic number.

745587779 is a deficient number, since it is larger than the sum of its proper divisors (12637141).

745587779 is a wasteful number, since it uses less digits than its factorization.

745587779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12637140.

The product of its digits is 17287200, while the sum is 59.

The square root of 745587779 is about 27305.4532831814. The cubic root of 745587779 is about 906.7751160794.

The spelling of 745587779 in words is "seven hundred forty-five million, five hundred eighty-seven thousand, seven hundred seventy-nine".