90151601 has 4 divisors (see below), whose sum is σ = 90295104. Its totient is φ = 90008100.

The previous prime is 90151597. The next prime is 90151603. The reversal of 90151601 is 10615109.

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.

It is a cyclic number.

It is not a de Polignac number, because 90151601 - 2² = 90151597 is a prime.

It is a super-2 number, since 2×90151601² = 16254622325726402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90151603) 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, 70805 + ... + 72066.

It is an arithmetic number, because the mean of its divisors is an integer number (22573776).

Almost surely, 2^90151601 is an apocalyptic number.

It is an amenable number.

90151601 is a deficient number, since it is larger than the sum of its proper divisors (143503).

90151601 is a wasteful number, since it uses less digits than its factorization.

90151601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143502.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 90151601 is about 9494.8196928641. The cubic root of 90151601 is about 448.3919577419.

The spelling of 90151601 in words is "ninety million, one hundred fifty-one thousand, six hundred one".