73389681 has 12 divisors (see below), whose sum is σ = 106086708. Its totient is φ = 48889824.

The previous prime is 73389677. The next prime is 73389689. The reversal of 73389681 is 18698337.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 34751025 + 38638656 = 5895^2 + 6216^2 .

It is not a de Polignac number, because 73389681 - 2² = 73389677 is a prime.

It is a super-2 number, since 2×73389681² = 10772090554563522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (73389689) 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, 15691 + ... + 19823.

It is an arithmetic number, because the mean of its divisors is an integer number (8840559).

Almost surely, 2^73389681 is an apocalyptic number.

It is an amenable number.

73389681 is a deficient number, since it is larger than the sum of its proper divisors (32697027).

73389681 is a wasteful number, since it uses less digits than its factorization.

73389681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6112 (or 6109 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 73389681 is about 8566.7777489556. Note that the first 4 decimals coincide. The cubic root of 73389681 is about 418.6762574237.

The spelling of 73389681 in words is "seventy-three million, three hundred eighty-nine thousand, six hundred eighty-one".