90615773 has 8 divisors (see below), whose sum is σ = 91505592. Its totient is φ = 89729536.

The previous prime is 90615757. The next prime is 90615787. The reversal of 90615773 is 37751609.

It can be written as a sum of positive squares in 4 ways, for example, as 68591524 + 22024249 = 8282^2 + 4693^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90615773 - 2⁴ = 90615757 is a prime.

It is a super-2 number, since 2×90615773² = 16422436632775058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90615673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92261 + ... + 93237.

It is an arithmetic number, because the mean of its divisors is an integer number (11438199).

Almost surely, 2^90615773 is an apocalyptic number.

It is an amenable number.

90615773 is a deficient number, since it is larger than the sum of its proper divisors (889819).

90615773 is a wasteful number, since it uses less digits than its factorization.

90615773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791.

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 90615773 is about 9519.2317442113. The cubic root of 90615773 is about 449.1601999766.

The spelling of 90615773 in words is "ninety million, six hundred fifteen thousand, seven hundred seventy-three".