90881701 has 4 divisors (see below), whose sum is σ = 91389600. Its totient is φ = 90373804.

The previous prime is 90881689. The next prime is 90881723. The reversal of 90881701 is 10718809.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10718809 = 73 ⋅146833.

It is a cyclic number.

It is not a de Polignac number, because 90881701 - 2⁷ = 90881573 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90881501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253681 + ... + 254038.

It is an arithmetic number, because the mean of its divisors is an integer number (22847400).

Almost surely, 2^90881701 is an apocalyptic number.

It is an amenable number.

90881701 is a deficient number, since it is larger than the sum of its proper divisors (507899).

90881701 is a wasteful number, since it uses less digits than its factorization.

90881701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507898.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 90881701 is about 9533.1894453011. The cubic root of 90881701 is about 449.5991508582.

The spelling of 90881701 in words is "ninety million, eight hundred eighty-one thousand, seven hundred one".