747987965 has 4 divisors (see below), whose sum is σ = 897585564. Its totient is φ = 598390368.

The previous prime is 747987943. The next prime is 747987973. The reversal of 747987965 is 569789747.

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

It can be written as a sum of positive squares in 2 ways, for example, as 273009529 + 474978436 = 16523^2 + 21794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-747987965 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 747987898 and 747987907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74798792 + ... + 74798801.

It is an arithmetic number, because the mean of its divisors is an integer number (224396391).

Almost surely, 2^747987965 is an apocalyptic number.

It is an amenable number.

747987965 is a deficient number, since it is larger than the sum of its proper divisors (149597599).

747987965 is a wasteful number, since it uses less digits than its factorization.

747987965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149597598.

The product of its digits is 26671680, while the sum is 62.

The square root of 747987965 is about 27349.3686398791. The cubic root of 747987965 is about 907.7470998504.

The spelling of 747987965 in words is "seven hundred forty-seven million, nine hundred eighty-seven thousand, nine hundred sixty-five".