90164024693 has 2 divisors, whose sum is σ = 90164024694. Its totient is φ = 90164024692.

The previous prime is 90164024659. The next prime is 90164024749. The reversal of 90164024693 is 39642046109.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56807385649 + 33356639044 = 238343^2 + 182638^2 .

It is a cyclic number.

It is not a de Polignac number, because 90164024693 - 2⁸ = 90164024437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90164021693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45082012346 + 45082012347.

It is an arithmetic number, because the mean of its divisors is an integer number (45082012347).

Almost surely, 2^90164024693 is an apocalyptic number.

It is an amenable number.

90164024693 is a deficient number, since it is larger than the sum of its proper divisors (1).

90164024693 is an equidigital number, since it uses as much as digits as its factorization.

90164024693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 90164024693 in words is "ninety billion, one hundred sixty-four million, twenty-four thousand, six hundred ninety-three".