74989681 has 8 divisors (see below), whose sum is σ = 80835944. Its totient is φ = 69154560.

The previous prime is 74989667. The next prime is 74989693. The reversal of 74989681 is 18698947.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12895281 + 62094400 = 3591^2 + 7880^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74989681 - 2⁹ = 74989169 is a prime.

It is a super-2 number, since 2×74989681² = 11246904512963522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74989631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15865 + ... + 20041.

It is an arithmetic number, because the mean of its divisors is an integer number (10104493).

Almost surely, 2^74989681 is an apocalyptic number.

It is an amenable number.

74989681 is a deficient number, since it is larger than the sum of its proper divisors (5846263).

74989681 is a wasteful number, since it uses less digits than its factorization.

74989681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571.

The product of its digits is 870912, while the sum is 52.

The square root of 74989681 is about 8659.6582496078. The cubic root of 74989681 is about 421.6969909156.

The spelling of 74989681 in words is "seventy-four million, nine hundred eighty-nine thousand, six hundred eighty-one".