90043973 has 2 divisors, whose sum is σ = 90043974. Its totient is φ = 90043972.

The previous prime is 90043969. The next prime is 90044083. The reversal of 90043973 is 37934009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90003169 + 40804 = 9487^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 90043973 - 2² = 90043969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90043673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45021986 + 45021987.

It is an arithmetic number, because the mean of its divisors is an integer number (45021987).

Almost surely, 2^90043973 is an apocalyptic number.

It is an amenable number.

90043973 is a deficient number, since it is larger than the sum of its proper divisors (1).

90043973 is an equidigital number, since it uses as much as digits as its factorization.

90043973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 90043973 is about 9489.1502780808. The cubic root of 90043973 is about 448.2134482578.

The spelling of 90043973 in words is "ninety million, forty-three thousand, nine hundred seventy-three".