1899912431 has 2 divisors, whose sum is σ = 1899912432. Its totient is φ = 1899912430.

The previous prime is 1899912403. The next prime is 1899912433. The reversal of 1899912431 is 1342199981.

It is a strong prime.

It is an emirp because it is prime and its reverse (1342199981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1899912431 - 2¹⁰ = 1899911407 is a prime.

It is a super-2 number, since 2×1899912431² = 7219334490936659522, which contains 22 as substring.

Together with 1899912433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1899912433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949956215 + 949956216.

It is an arithmetic number, because the mean of its divisors is an integer number (949956216).

Almost surely, 2^1899912431 is an apocalyptic number.

1899912431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1899912431 is an equidigital number, since it uses as much as digits as its factorization.

1899912431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 47.

The square root of 1899912431 is about 43587.9849385126. The cubic root of 1899912431 is about 1238.5433013265.

The spelling of 1899912431 in words is "one billion, eight hundred ninety-nine million, nine hundred twelve thousand, four hundred thirty-one".