90190389097 has 2 divisors, whose sum is σ = 90190389098. Its totient is φ = 90190389096.

The previous prime is 90190389053. The next prime is 90190389101. The reversal of 90190389097 is 79098309109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79593951376 + 10596437721 = 282124^2 + 102939^2 .

It is a cyclic number.

It is not a de Polignac number, because 90190389097 - 2²⁷ = 90056171369 is a prime.

It is not a weakly prime, because it can be changed into another prime (90190389797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45095194548 + 45095194549.

It is an arithmetic number, because the mean of its divisors is an integer number (45095194549).

Almost surely, 2^90190389097 is an apocalyptic number.

It is an amenable number.

90190389097 is a deficient number, since it is larger than the sum of its proper divisors (1).

90190389097 is an equidigital number, since it uses as much as digits as its factorization.

90190389097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 90190389097 in words is "ninety billion, one hundred ninety million, three hundred eighty-nine thousand, ninety-seven".