90488869813 has 4 divisors (see below), whose sum is σ = 90629599648. Its totient is φ = 90348139980.

The previous prime is 90488869811. The next prime is 90488869819. The reversal of 90488869813 is 31896888409.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31896888409 = 178597².

It is a cyclic number.

It is not a de Polignac number, because 90488869813 - 2¹ = 90488869811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90488869811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70363953 + ... + 70365238.

It is an arithmetic number, because the mean of its divisors is an integer number (22657399912).

Almost surely, 2^90488869813 is an apocalyptic number.

It is an amenable number.

90488869813 is a deficient number, since it is larger than the sum of its proper divisors (140729835).

90488869813 is a wasteful number, since it uses less digits than its factorization.

90488869813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140729834.

The product of its (nonzero) digits is 23887872, while the sum is 64.

The spelling of 90488869813 in words is "ninety billion, four hundred eighty-eight million, eight hundred sixty-nine thousand, eight hundred thirteen".