90711199489 has 3 divisors (see below), whose sum is σ = 90711500673. Its totient is φ = 90710898306.

The previous prime is 90711199457. The next prime is 90711199493. The reversal of 90711199489 is 98499111709.

The square root of 90711199489 is 301183.

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.

It is not a de Polignac number, because 90711199489 - 2⁵ = 90711199457 is a prime.

It is a super-2 number, since 2×90711199489² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90711199409) 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, 150592 + ... + 451774.

It is an arithmetic number, because the mean of its divisors is an integer number (30237166891).

Almost surely, 2^90711199489 is an apocalyptic number.

90711199489 is the 301183-rd square number.

90711199489 is the 150592-nd centered octagonal number.

It is an amenable number.

90711199489 is a deficient number, since it is larger than the sum of its proper divisors (301184).

90711199489 is an frugal number, since it uses more digits than its factorization.

90711199489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602366 (or 301183 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 58.

The spelling of 90711199489 in words is "ninety billion, seven hundred eleven million, one hundred ninety-nine thousand, four hundred eighty-nine".