745977687 has 16 divisors (see below), whose sum is σ = 1224168960. Its totient is φ = 393482592.

The previous prime is 745977647. The next prime is 745977721. The reversal of 745977687 is 786779547.

It is not a de Polignac number, because 745977687 - 2⁶ = 745977623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 745977687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745977637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1365987 + ... + 1366532.

It is an arithmetic number, because the mean of its divisors is an integer number (76510560).

Almost surely, 2^745977687 is an apocalyptic number.

745977687 is a deficient number, since it is larger than the sum of its proper divisors (478191273).

745977687 is a wasteful number, since it uses less digits than its factorization.

745977687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732542.

The product of its digits is 20744640, while the sum is 60.

The square root of 745977687 is about 27312.5920959546. The cubic root of 745977687 is about 906.9331557130.

The spelling of 745977687 in words is "seven hundred forty-five million, nine hundred seventy-seven thousand, six hundred eighty-seven".