747898989 has 4 divisors (see below), whose sum is σ = 997198656. Its totient is φ = 498599324.

The previous prime is 747898967. The next prime is 747898993. The reversal of 747898989 is 989898747.

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 a cyclic number.

It is not a de Polignac number, because 747898989 - 2⁷ = 747898861 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747893989) 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, 124649829 + ... + 124649834.

It is an arithmetic number, because the mean of its divisors is an integer number (249299664).

Almost surely, 2^747898989 is an apocalyptic number.

It is an amenable number.

747898989 is a deficient number, since it is larger than the sum of its proper divisors (249299667).

747898989 is a wasteful number, since it uses less digits than its factorization.

747898989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249299666.

The product of its digits is 73156608, while the sum is 69.

The square root of 747898989 is about 27347.7419360356. The cubic root of 747898989 is about 907.7111051052.

The spelling of 747898989 in words is "seven hundred forty-seven million, eight hundred ninety-eight thousand, nine hundred eighty-nine".