90159797 has 8 divisors (see below), whose sum is σ = 110966016. Its totient is φ = 71335152.

The previous prime is 90159761. The next prime is 90159799. The reversal of 90159797 is 79795109.

It is a happy number.

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

It is not a de Polignac number, because 90159797 - 2¹⁴ = 90143413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90159799) 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, 495293 + ... + 495474.

It is an arithmetic number, because the mean of its divisors is an integer number (13870752).

Almost surely, 2^90159797 is an apocalyptic number.

It is an amenable number.

90159797 is a deficient number, since it is larger than the sum of its proper divisors (20806219).

90159797 is a wasteful number, since it uses less digits than its factorization.

90159797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990787.

The product of its (nonzero) digits is 178605, while the sum is 47.

The square root of 90159797 is about 9495.2512868275. The cubic root of 90159797 is about 448.4055456282.

The spelling of 90159797 in words is "ninety million, one hundred fifty-nine thousand, seven hundred ninety-seven".