97077581 has 4 divisors (see below), whose sum is σ = 97257564. Its totient is φ = 96897600.

The previous prime is 97077571. The next prime is 97077583. The reversal of 97077581 is 18577079.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11792356 + 85285225 = 3434^2 + 9235^2 .

It is a cyclic number.

It is not a de Polignac number, because 97077581 - 2¹⁴ = 97061197 is a prime.

It is a super-2 number, since 2×97077581² = 18848113465623122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97077583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89180 + ... + 90261.

It is an arithmetic number, because the mean of its divisors is an integer number (24314391).

Almost surely, 2^97077581 is an apocalyptic number.

It is an amenable number.

97077581 is a deficient number, since it is larger than the sum of its proper divisors (179983).

97077581 is a wasteful number, since it uses less digits than its factorization.

97077581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179982.

The product of its (nonzero) digits is 123480, while the sum is 44.

The square root of 97077581 is about 9852.7955931299. The cubic root of 97077581 is about 459.5925519351.

The spelling of 97077581 in words is "ninety-seven million, seventy-seven thousand, five hundred eighty-one".