90571769 has 4 divisors (see below), whose sum is σ = 94509696. Its totient is φ = 86633844.

The previous prime is 90571729. The next prime is 90571771. The reversal of 90571769 is 96717509.

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: 96717509 = 7 ⋅13816787.

It is a cyclic number.

It is not a de Polignac number, because 90571769 - 2⁸ = 90571513 is a prime.

It is a super-2 number, since 2×90571769² = 16406490679578722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90571729) 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, 1968929 + ... + 1968974.

It is an arithmetic number, because the mean of its divisors is an integer number (23627424).

Almost surely, 2^90571769 is an apocalyptic number.

It is an amenable number.

90571769 is a deficient number, since it is larger than the sum of its proper divisors (3937927).

90571769 is a wasteful number, since it uses less digits than its factorization.

90571769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937926.

The product of its (nonzero) digits is 119070, while the sum is 44.

The square root of 90571769 is about 9516.9201425671. The cubic root of 90571769 is about 449.0874825199.

The spelling of 90571769 in words is "ninety million, five hundred seventy-one thousand, seven hundred sixty-nine".