90863196901 has 4 divisors (see below), whose sum is σ = 90863812204. Its totient is φ = 90862581600.

The previous prime is 90863196881. The next prime is 90863196959. The reversal of 90863196901 is 10969136809.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2921294401 + 87941902500 = 54049^2 + 296550^2 .

It is a 3-Lehmer number, since φ(90863196901) divides (90863196901-1)³.

It is a cyclic number.

It is not a de Polignac number, because 90863196901 - 2¹¹ = 90863194853 is a prime.

It is a super-2 number, since 2×90863196901² (a number of 23 digits) contains 22 as substring.

It is a deceptive number, since it divides R_90863196900.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90863194901) 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, 61531 + ... + 430711.

It is an arithmetic number, because the mean of its divisors is an integer number (22715953051).

Almost surely, 2^90863196901 is an apocalyptic number.

90863196901 is the 246121-st pentagonal number.

It is an amenable number.

90863196901 is a deficient number, since it is larger than the sum of its proper divisors (615303).

90863196901 is a wasteful number, since it uses less digits than its factorization.

90863196901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615302.

The product of its (nonzero) digits is 629856, while the sum is 52.

The spelling of 90863196901 in words is "ninety billion, eight hundred sixty-three million, one hundred ninety-six thousand, nine hundred one".