90489701 has 4 divisors (see below), whose sum is σ = 90511212. Its totient is φ = 90468192.

The previous prime is 90489697. The next prime is 90489703. The reversal of 90489701 is 10798409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10798409 = 349 ⋅30941.

It can be written as a sum of positive squares in 2 ways, for example, as 19492225 + 70997476 = 4415^2 + 8426^2 .

It is a cyclic number.

It is not a de Polignac number, because 90489701 - 2² = 90489697 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90489703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2150 + ... + 13623.

It is an arithmetic number, because the mean of its divisors is an integer number (22627803).

Almost surely, 2^90489701 is an apocalyptic number.

It is an amenable number.

90489701 is a deficient number, since it is larger than the sum of its proper divisors (21511).

90489701 is a wasteful number, since it uses less digits than its factorization.

90489701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21510.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 90489701 is about 9512.6074763968. The cubic root of 90489701 is about 448.9518006207.

The spelling of 90489701 in words is "ninety million, four hundred eighty-nine thousand, seven hundred one".