74730581 has 2 divisors, whose sum is σ = 74730582. Its totient is φ = 74730580.

The previous prime is 74730559. The next prime is 74730599. The reversal of 74730581 is 18503747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61371556 + 13359025 = 7834^2 + 3655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74730581 is a prime.

It is a super-2 number, since 2×74730581² = 11169319473195122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74738581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37365290 + 37365291.

It is an arithmetic number, because the mean of its divisors is an integer number (37365291).

Almost surely, 2^74730581 is an apocalyptic number.

It is an amenable number.

74730581 is a deficient number, since it is larger than the sum of its proper divisors (1).

74730581 is an equidigital number, since it uses as much as digits as its factorization.

74730581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 74730581 is about 8644.6851301826. The cubic root of 74730581 is about 421.2107561465.

The spelling of 74730581 in words is "seventy-four million, seven hundred thirty thousand, five hundred eighty-one".