90709655 has 4 divisors (see below), whose sum is σ = 108851592. Its totient is φ = 72567720.

The previous prime is 90709649. The next prime is 90709673. The reversal of 90709655 is 55690709.

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

It is not a de Polignac number, because 90709655 - 2⁴ = 90709639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9070961 + ... + 9070970.

It is an arithmetic number, because the mean of its divisors is an integer number (27212898).

Almost surely, 2^90709655 is an apocalyptic number.

90709655 is a deficient number, since it is larger than the sum of its proper divisors (18141937).

90709655 is a wasteful number, since it uses less digits than its factorization.

90709655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18141936.

The product of its (nonzero) digits is 85050, while the sum is 41.

The square root of 90709655 is about 9524.1616428954. The cubic root of 90709655 is about 449.3152631339.

The spelling of 90709655 in words is "ninety million, seven hundred nine thousand, six hundred fifty-five".