1894131387 has 6 divisors (see below), whose sum is σ = 2735967572. Its totient is φ = 1262754252.

The previous prime is 1894131353. The next prime is 1894131401. The reversal of 1894131387 is 7831314981.

It is not a de Polignac number, because 1894131387 - 2¹⁰ = 1894130363 is a prime.

It is a super-2 number, since 2×1894131387² = 7175467422437087538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1894131307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105229513 + ... + 105229530.

Almost surely, 2^1894131387 is an apocalyptic number.

1894131387 is a deficient number, since it is larger than the sum of its proper divisors (841836185).

1894131387 is a wasteful number, since it uses less digits than its factorization.

1894131387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210459049 (or 210459046 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1894131387 is about 43521.6197653534. The cubic root of 1894131387 is about 1237.2858139257.

The spelling of 1894131387 in words is "one billion, eight hundred ninety-four million, one hundred thirty-one thousand, three hundred eighty-seven".