8920991401 has 27 divisors (see below), whose sum is σ = 10559814813. Its totient is φ = 7514521560.

The previous prime is 8920991389. The next prime is 8920991411. The reversal of 8920991401 is 1041990298.

It is a happy number.

The square root of 8920991401 is 94451.

It is a perfect power (a square), and thus also a powerful number.

8920991401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8920991401 - 2¹¹ = 8920989353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8920991411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 68099106 + ... + 68099236.

Almost surely, 2^8920991401 is an apocalyptic number.

8920991401 is the 94451-st square number.

8920991401 is the 47226-th centered octagonal number.

It is an amenable number.

8920991401 is a deficient number, since it is larger than the sum of its proper divisors (1638823412).

8920991401 is an equidigital number, since it uses as much as digits as its factorization.

8920991401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The cubic root of 8920991401 is about 2073.9790904548.

Multiplying 8920991401 by its product of nonzero digits (46656), we get a square (416217774805056 = 20401416²).

The spelling of 8920991401 in words is "eight billion, nine hundred twenty million, nine hundred ninety-one thousand, four hundred one".