1889120431 has 4 divisors (see below), whose sum is σ = 2060858664. Its totient is φ = 1717382200.

The previous prime is 1889120413. The next prime is 1889120549. The reversal of 1889120431 is 1340219881.

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

It is a cyclic number.

It is not a de Polignac number, because 1889120431 - 2¹¹ = 1889118383 is a prime.

It is a super-2 number, since 2×1889120431² = 7137552005643251522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889120411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85869100 + ... + 85869121.

It is an arithmetic number, because the mean of its divisors is an integer number (515214666).

Almost surely, 2^1889120431 is an apocalyptic number.

1889120431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1889120431 is a deficient number, since it is larger than the sum of its proper divisors (171738233).

1889120431 is a wasteful number, since it uses less digits than its factorization.

1889120431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171738232.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1889120431 is about 43464.0130567807. The cubic root of 1889120431 is about 1236.1937636324.

The spelling of 1889120431 in words is "one billion, eight hundred eighty-nine million, one hundred twenty thousand, four hundred thirty-one".