90469799993 has 2 divisors, whose sum is σ = 90469799994. Its totient is φ = 90469799992.

The previous prime is 90469799989. The next prime is 90469800013. The reversal of 90469799993 is 39999796409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89695458064 + 774341929 = 299492^2 + 27827^2 .

It is a cyclic number.

It is not a de Polignac number, because 90469799993 - 2² = 90469799989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90469799993.

It is not a weakly prime, because it can be changed into another prime (90469799093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45234899996 + 45234899997.

It is an arithmetic number, because the mean of its divisors is an integer number (45234899997).

Almost surely, 2^90469799993 is an apocalyptic number.

It is an amenable number.

90469799993 is a deficient number, since it is larger than the sum of its proper divisors (1).

90469799993 is an equidigital number, since it uses as much as digits as its factorization.

90469799993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 267846264, while the sum is 74.

The spelling of 90469799993 in words is "ninety billion, four hundred sixty-nine million, seven hundred ninety-nine thousand, nine hundred ninety-three".