90072943 has 4 divisors (see below), whose sum is σ = 91341648. Its totient is φ = 88804240.

The previous prime is 90072929. The next prime is 90072947. The reversal of 90072943 is 34927009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34927009 = 13 ⋅2686693.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90072943 is a prime.

It is a super-2 number, since 2×90072943² = 16226270121362498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90072899 and 90072908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90072947) 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, 634246 + ... + 634387.

It is an arithmetic number, because the mean of its divisors is an integer number (22835412).

Almost surely, 2^90072943 is an apocalyptic number.

90072943 is a deficient number, since it is larger than the sum of its proper divisors (1268705).

90072943 is a wasteful number, since it uses less digits than its factorization.

90072943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268704.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 90072943 is about 9490.6766355197. The cubic root of 90072943 is about 448.2615112611.

The spelling of 90072943 in words is "ninety million, seventy-two thousand, nine hundred forty-three".