1401931243 has 2 divisors, whose sum is σ = 1401931244. Its totient is φ = 1401931242.

The previous prime is 1401931229. The next prime is 1401931247. The reversal of 1401931243 is 3421391041.

It is a strong prime.

It is an emirp because it is prime and its reverse (3421391041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1401931243 - 2⁵ = 1401931211 is a prime.

It is a super-2 number, since 2×1401931243² = 3930822420199050098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1401931247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700965621 + 700965622.

It is an arithmetic number, because the mean of its divisors is an integer number (700965622).

Almost surely, 2^1401931243 is an apocalyptic number.

1401931243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401931243 is an equidigital number, since it uses as much as digits as its factorization.

1401931243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1401931243 is about 37442.3722939666. The cubic root of 1401931243 is about 1119.2031010164.

The spelling of 1401931243 in words is "one billion, four hundred one million, nine hundred thirty-one thousand, two hundred forty-three".