90055739 has 4 divisors (see below), whose sum is σ = 90388320. Its totient is φ = 89723160.

The previous prime is 90055729. The next prime is 90055751. The reversal of 90055739 is 93755009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93755009 = 179 ⋅523771.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90055739 is a prime.

It is a super-2 number, since 2×90055739² = 16220072253672242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90055709) 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, 165884 + ... + 166425.

It is an arithmetic number, because the mean of its divisors is an integer number (22597080).

Almost surely, 2^90055739 is an apocalyptic number.

90055739 is a deficient number, since it is larger than the sum of its proper divisors (332581).

90055739 is a wasteful number, since it uses less digits than its factorization.

90055739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332580.

The product of its (nonzero) digits is 42525, while the sum is 38.

The square root of 90055739 is about 9489.7702290414. The cubic root of 90055739 is about 448.2329700151.

The spelling of 90055739 in words is "ninety million, fifty-five thousand, seven hundred thirty-nine".