90151072189 has 2 divisors, whose sum is σ = 90151072190. Its totient is φ = 90151072188.

The previous prime is 90151072177. The next prime is 90151072217. The reversal of 90151072189 is 98127015109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54753660025 + 35397412164 = 233995^2 + 188142^2 .

It is a cyclic number.

It is not a de Polignac number, because 90151072189 - 2⁹ = 90151071677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90151072129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45075536094 + 45075536095.

It is an arithmetic number, because the mean of its divisors is an integer number (45075536095).

Almost surely, 2^90151072189 is an apocalyptic number.

It is an amenable number.

90151072189 is a deficient number, since it is larger than the sum of its proper divisors (1).

90151072189 is an equidigital number, since it uses as much as digits as its factorization.

90151072189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 43.

The spelling of 90151072189 in words is "ninety billion, one hundred fifty-one million, seventy-two thousand, one hundred eighty-nine".