1925156139 has 32 divisors (see below), whose sum is σ = 2716665600. Its totient is φ = 1211075712.

The previous prime is 1925156131. The next prime is 1925156179. The reversal of 1925156139 is 9316515291.

It is not a de Polignac number, because 1925156139 - 2³ = 1925156131 is a prime.

It is a super-4 number, since 4×1925156139⁴ (a number of 38 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1925156139.

It is not an unprimeable number, because it can be changed into a prime (1925156131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 709824 + ... + 712530.

It is an arithmetic number, because the mean of its divisors is an integer number (84895800).

Almost surely, 2^1925156139 is an apocalyptic number.

1925156139 is a deficient number, since it is larger than the sum of its proper divisors (791509461).

1925156139 is a wasteful number, since it uses less digits than its factorization.

1925156139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939.

The product of its digits is 72900, while the sum is 42.

The square root of 1925156139 is about 43876.6012699252. The cubic root of 1925156139 is about 1244.0045997683.

The spelling of 1925156139 in words is "one billion, nine hundred twenty-five million, one hundred fifty-six thousand, one hundred thirty-nine".