90200901 has 8 divisors (see below), whose sum is σ = 137449024. Its totient is φ = 51543360.

The previous prime is 90200899. The next prime is 90200927. The reversal of 90200901 is 10900209.

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 90200901 - 2¹ = 90200899 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 4295281 = 90200901 / (9 + 0 + 2 + 0 + 0 + 9 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90200941) 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, 2147620 + ... + 2147661.

It is an arithmetic number, because the mean of its divisors is an integer number (17181128).

Almost surely, 2^90200901 is an apocalyptic number.

It is an amenable number.

90200901 is a deficient number, since it is larger than the sum of its proper divisors (47248123).

90200901 is a wasteful number, since it uses less digits than its factorization.

90200901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295291.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 90200901 is about 9497.4154905427. The cubic root of 90200901 is about 448.4736782177.

The spelling of 90200901 in words is "ninety million, two hundred thousand, nine hundred one".