90909143 has 8 divisors (see below), whose sum is σ = 101060736. Its totient is φ = 81208800.

The previous prime is 90909127. The next prime is 90909157. The reversal of 90909143 is 34190909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90909143 - 2⁴ = 90909127 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 (90909193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112388 + ... + 113193.

It is an arithmetic number, because the mean of its divisors is an integer number (12632592).

Almost surely, 2^90909143 is an apocalyptic number.

90909143 is a deficient number, since it is larger than the sum of its proper divisors (10151593).

90909143 is a wasteful number, since it uses less digits than its factorization.

90909143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225625.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 90909143 is about 9534.6286241259. The cubic root of 90909143 is about 449.6443989047.

The spelling of 90909143 in words is "ninety million, nine hundred nine thousand, one hundred forty-three".