90180473 has 2 divisors, whose sum is σ = 90180474. Its totient is φ = 90180472.

The previous prime is 90180469. The next prime is 90180511. The reversal of 90180473 is 37408109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47513449 + 42667024 = 6893^2 + 6532^2 .

It is a cyclic number.

It is not a de Polignac number, because 90180473 - 2² = 90180469 is a prime.

It is equal to p_5226908 and since 90180473 and 5226908 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (90180373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45090236 + 45090237.

It is an arithmetic number, because the mean of its divisors is an integer number (45090237).

Almost surely, 2^90180473 is an apocalyptic number.

It is an amenable number.

90180473 is a deficient number, since it is larger than the sum of its proper divisors (1).

90180473 is an equidigital number, since it uses as much as digits as its factorization.

90180473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 90180473 is about 9496.3399791709. The cubic root of 90180473 is about 448.4398200489.

The spelling of 90180473 in words is "ninety million, one hundred eighty thousand, four hundred seventy-three".