90702065 has 4 divisors (see below), whose sum is σ = 108842484. Its totient is φ = 72561648.

The previous prime is 90702047. The next prime is 90702071. The reversal of 90702065 is 56020709.

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 40462321 + 50239744 = 6361^2 + 7088^2 .

It is a cyclic number.

It is not a de Polignac number, because 90702065 - 2²⁰ = 89653489 is a prime.

It is a Duffinian 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, 9070202 + ... + 9070211.

It is an arithmetic number, because the mean of its divisors is an integer number (27210621).

Almost surely, 2^90702065 is an apocalyptic number.

It is an amenable number.

90702065 is a deficient number, since it is larger than the sum of its proper divisors (18140419).

90702065 is a wasteful number, since it uses less digits than its factorization.

90702065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140418.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 90702065 is about 9523.7631742920. The cubic root of 90702065 is about 449.3027308481.

The spelling of 90702065 in words is "ninety million, seven hundred two thousand, sixty-five".