90709077 has 4 divisors (see below), whose sum is σ = 120945440. Its totient is φ = 60472716.

The previous prime is 90709049. The next prime is 90709109. The reversal of 90709077 is 77090709.

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: 77090709 = 3 ⋅25696903.

It is not a de Polignac number, because 90709077 - 2¹² = 90704981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90709027) 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, 15118177 + ... + 15118182.

It is an arithmetic number, because the mean of its divisors is an integer number (30236360).

Almost surely, 2^90709077 is an apocalyptic number.

It is an amenable number.

90709077 is a deficient number, since it is larger than the sum of its proper divisors (30236363).

90709077 is a wasteful number, since it uses less digits than its factorization.

90709077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30236362.

The product of its (nonzero) digits is 27783, while the sum is 39.

The square root of 90709077 is about 9524.1312989690. The cubic root of 90709077 is about 449.3143087895.

The spelling of 90709077 in words is "ninety million, seven hundred nine thousand, seventy-seven".