2391943401 has 12 divisors (see below), whose sum is σ = 3658266612. Its totient is φ = 1500827136.

The previous prime is 2391943391. The next prime is 2391943409. The reversal of 2391943401 is 1043491932.

2391943401 is a `hidden beast` number, since 239 + 19 + 4 + 3 + 401 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1789290000 + 602653401 = 42300^2 + 24549^2 .

It is not a de Polignac number, because 2391943401 - 2⁵ = 2391943369 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2391943409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7816656 + ... + 7816961.

It is an arithmetic number, because the mean of its divisors is an integer number (304855551).

Almost surely, 2^2391943401 is an apocalyptic number.

It is an amenable number.

2391943401 is a deficient number, since it is larger than the sum of its proper divisors (1266323211).

2391943401 is a wasteful number, since it uses less digits than its factorization.

2391943401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15633640 (or 15633637 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 2391943401 is about 48907.4984128201. The cubic root of 2391943401 is about 1337.3660670733.

The spelling of 2391943401 in words is "two billion, three hundred ninety-one million, nine hundred forty-three thousand, four hundred one".