1939213137 has 16 divisors (see below), whose sum is σ = 2738878272. Its totient is φ = 1216243200.

The previous prime is 1939213123. The next prime is 1939213139. The reversal of 1939213137 is 7313129391.

It is not a de Polignac number, because 1939213137 - 2⁸ = 1939212881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1939213095 and 1939213104.

It is not an unprimeable number, because it can be changed into a prime (1939213139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138733 + ... + 152069.

It is an arithmetic number, because the mean of its divisors is an integer number (171179892).

Almost surely, 2^1939213137 is an apocalyptic number.

1939213137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1939213137 is a deficient number, since it is larger than the sum of its proper divisors (799665135).

1939213137 is a wasteful number, since it uses less digits than its factorization.

1939213137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16208.

The product of its digits is 30618, while the sum is 39.

The square root of 1939213137 is about 44036.4977830890. The cubic root of 1939213137 is about 1247.0250613020.

The spelling of 1939213137 in words is "one billion, nine hundred thirty-nine million, two hundred thirteen thousand, one hundred thirty-seven".