90020769 has 4 divisors (see below), whose sum is σ = 120027696. Its totient is φ = 60013844.

The previous prime is 90020767. The next prime is 90020771. The reversal of 90020769 is 96702009.

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: 96702009 = 3 ⋅32234003.

It is an interprime number because it is at equal distance from previous prime (90020767) and next prime (90020771).

It is a cyclic number.

It is not a de Polignac number, because 90020769 - 2¹ = 90020767 is a prime.

It is a super-2 number, since 2×90020769² = 16207477702702722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90020761) 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, 15003459 + ... + 15003464.

It is an arithmetic number, because the mean of its divisors is an integer number (30006924).

Almost surely, 2^90020769 is an apocalyptic number.

It is an amenable number.

90020769 is a deficient number, since it is larger than the sum of its proper divisors (30006927).

90020769 is a wasteful number, since it uses less digits than its factorization.

90020769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30006926.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 90020769 is about 9487.9275397739. The cubic root of 90020769 is about 448.1749439656.

The spelling of 90020769 in words is "ninety million, twenty thousand, seven hundred sixty-nine".