901964081 has 2 divisors, whose sum is σ = 901964082. Its totient is φ = 901964080.

The previous prime is 901964069. The next prime is 901964111. The reversal of 901964081 is 180469109.

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., 865301056 + 36663025 = 29416^2 + 6055^2 .

It is a cyclic number.

It is not a de Polignac number, because 901964081 - 2¹⁰ = 901963057 is a prime.

It is a super-2 number, since 2×901964081² = 1627078406828349122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (901964881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450982040 + 450982041.

It is an arithmetic number, because the mean of its divisors is an integer number (450982041).

Almost surely, 2^901964081 is an apocalyptic number.

It is an amenable number.

901964081 is a deficient number, since it is larger than the sum of its proper divisors (1).

901964081 is an equidigital number, since it uses as much as digits as its factorization.

901964081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 901964081 is about 30032.7168434692. The cubic root of 901964081 is about 966.1912074156.

The spelling of 901964081 in words is "nine hundred one million, nine hundred sixty-four thousand, eighty-one".