1939108087 has 4 divisors (see below), whose sum is σ = 2216123536. Its totient is φ = 1662092640.

The previous prime is 1939108033. The next prime is 1939108123. The reversal of 1939108087 is 7808019391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7808019391 = 19 ⋅410948389.

It is a cyclic number.

It is not a de Polignac number, because 1939108087 - 2⁷ = 1939107959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939108007) 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, 138507714 + ... + 138507727.

It is an arithmetic number, because the mean of its divisors is an integer number (554030884).

Almost surely, 2^1939108087 is an apocalyptic number.

1939108087 is a deficient number, since it is larger than the sum of its proper divisors (277015449).

1939108087 is an equidigital number, since it uses as much as digits as its factorization.

1939108087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277015448.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 1939108087 is about 44035.3050063242. The cubic root of 1939108087 is about 1247.0025431741.

The spelling of 1939108087 in words is "one billion, nine hundred thirty-nine million, one hundred eight thousand, eighty-seven".