9940790401 has 4 divisors (see below), whose sum is σ = 9965580804. Its totient is φ = 9916000000.

The previous prime is 9940790389. The next prime is 9940790467. The reversal of 9940790401 is 1040970499.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7249671025 + 2691119376 = 85145^2 + 51876^2 .

It is a cyclic number.

It is not a de Polignac number, because 9940790401 - 2⁵ = 9940790369 is a prime.

It is a super-2 number, since 2×9940790401² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9940790471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12394600 + ... + 12395401.

It is an arithmetic number, because the mean of its divisors is an integer number (2491395201).

Almost surely, 2^9940790401 is an apocalyptic number.

It is an amenable number.

9940790401 is a deficient number, since it is larger than the sum of its proper divisors (24790403).

9940790401 is a wasteful number, since it uses less digits than its factorization.

9940790401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24790402.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 9940790401 is about 99703.5124807547. The cubic root of 9940790401 is about 2150.1741629961.

The spelling of 9940790401 in words is "nine billion, nine hundred forty million, seven hundred ninety thousand, four hundred one".