73711989 has 12 divisors (see below), whose sum is σ = 114663276. Its totient is φ = 45361152.

The previous prime is 73711961. The next prime is 73712059. The reversal of 73711989 is 98911737.

It can be written as a sum of positive squares in 2 ways, for example, as 12215025 + 61496964 = 3495^2 + 7842^2 .

It is not a de Polignac number, because 73711989 - 2¹¹ = 73709941 is a prime.

It is a super-2 number, since 2×73711989² = 10866914644672242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73711909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314892 + ... + 315125.

It is an arithmetic number, because the mean of its divisors is an integer number (9555273).

Almost surely, 2^73711989 is an apocalyptic number.

It is an amenable number.

73711989 is a deficient number, since it is larger than the sum of its proper divisors (40951287).

73711989 is a wasteful number, since it uses less digits than its factorization.

73711989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630036 (or 630033 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 73711989 is about 8585.5686474455. The cubic root of 73711989 is about 419.2882673672.

The spelling of 73711989 in words is "seventy-three million, seven hundred eleven thousand, nine hundred eighty-nine".