90722143 has 4 divisors (see below), whose sum is σ = 94666608. Its totient is φ = 86777680.

The previous prime is 90722129. The next prime is 90722147. The reversal of 90722143 is 34122709.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90722143 - 2²⁵ = 57167711 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 (90722147) 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, 1972198 + ... + 1972243.

It is an arithmetic number, because the mean of its divisors is an integer number (23666652).

Almost surely, 2^90722143 is an apocalyptic number.

90722143 is a deficient number, since it is larger than the sum of its proper divisors (3944465).

90722143 is a wasteful number, since it uses less digits than its factorization.

90722143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944464.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 90722143 is about 9524.8172160940. The cubic root of 90722143 is about 449.3358812682.

The spelling of 90722143 in words is "ninety million, seven hundred twenty-two thousand, one hundred forty-three".