90672990997 has 2 divisors, whose sum is σ = 90672990998. Its totient is φ = 90672990996.

The previous prime is 90672990979. The next prime is 90672991037. The reversal of 90672990997 is 79909927609.

Together with previous prime (90672990979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54332812836 + 36340178161 = 233094^2 + 190631^2 .

It is a cyclic number.

It is not a de Polignac number, because 90672990997 - 2³¹ = 88525507349 is a prime.

It is a super-3 number, since 3×90672990997³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90672990907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45336495498 + 45336495499.

It is an arithmetic number, because the mean of its divisors is an integer number (45336495499).

Almost surely, 2^90672990997 is an apocalyptic number.

It is an amenable number.

90672990997 is a deficient number, since it is larger than the sum of its proper divisors (1).

90672990997 is an equidigital number, since it uses as much as digits as its factorization.

90672990997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34720812, while the sum is 67.

The spelling of 90672990997 in words is "ninety billion, six hundred seventy-two million, nine hundred ninety thousand, nine hundred ninety-seven".