90649441 has 3 divisors (see below), whose sum is σ = 90658963. Its totient is φ = 90639920.

The previous prime is 90649439. The next prime is 90649453. The reversal of 90649441 is 14494609.

The square root of 90649441 is 9521.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14494609 = 421 ⋅34429.

It can be written as a sum of positive squares in only one way, i.e., 39955041 + 50694400 = 6321^2 + 7120^2 .

It is not a de Polignac number, because 90649441 - 2¹ = 90649439 is a prime.

It is a super-2 number, since 2×90649441² = 16434642307224962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90649441.

It is not an unprimeable number, because it can be changed into a prime (90649541) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4761 + ... + 14281.

Almost surely, 2^90649441 is an apocalyptic number.

90649441 is the 9521-st square number.

90649441 is the 4761-st centered octagonal number.

It is an amenable number.

90649441 is a deficient number, since it is larger than the sum of its proper divisors (9522).

90649441 is an frugal number, since it uses more digits than its factorization.

90649441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19042 (or 9521 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The cubic root of 90649441 is about 449.2158210994.

The spelling of 90649441 in words is "ninety million, six hundred forty-nine thousand, four hundred forty-one".