74731553 has 8 divisors (see below), whose sum is σ = 80774568. Its totient is φ = 68730624.

The previous prime is 74731519. The next prime is 74731597. The reversal of 74731553 is 35513747.

It can be written as a sum of positive squares in 4 ways, for example, as 478864 + 74252689 = 692^2 + 8617^2 .

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 74731553 - 2²² = 70537249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74731513) 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, 6776 + ... + 13977.

It is an arithmetic number, because the mean of its divisors is an integer number (10096821).

Almost surely, 2^74731553 is an apocalyptic number.

It is an amenable number.

74731553 is a deficient number, since it is larger than the sum of its proper divisors (6043015).

74731553 is a wasteful number, since it uses less digits than its factorization.

74731553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21043.

The product of its digits is 44100, while the sum is 35.

The square root of 74731553 is about 8644.7413495142. The cubic root of 74731553 is about 421.2125823292.

The spelling of 74731553 in words is "seventy-four million, seven hundred thirty-one thousand, five hundred fifty-three".