747981863 has 4 divisors (see below), whose sum is σ = 748415208. Its totient is φ = 747548520.

The previous prime is 747981853. The next prime is 747981869. The reversal of 747981863 is 368189747.

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 747981863 - 2⁶ = 747981799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747981869) 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, 214073 + ... + 217538.

It is an arithmetic number, because the mean of its divisors is an integer number (187103802).

Almost surely, 2^747981863 is an apocalyptic number.

747981863 is a deficient number, since it is larger than the sum of its proper divisors (433345).

747981863 is a wasteful number, since it uses less digits than its factorization.

747981863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433344.

The product of its digits is 2032128, while the sum is 53.

The square root of 747981863 is about 27349.2570831458. The cubic root of 747981863 is about 907.7446314115.

The spelling of 747981863 in words is "seven hundred forty-seven million, nine hundred eighty-one thousand, eight hundred sixty-three".