1926157139 has 2 divisors, whose sum is σ = 1926157140. Its totient is φ = 1926157138.

The previous prime is 1926157133. The next prime is 1926157151. The reversal of 1926157139 is 9317516291.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1926157139 - 2¹² = 1926153043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1926157139.

It is not a weakly prime, because it can be changed into another prime (1926157133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 963078569 + 963078570.

It is an arithmetic number, because the mean of its divisors is an integer number (963078570).

Almost surely, 2^1926157139 is an apocalyptic number.

1926157139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1926157139 is an equidigital number, since it uses as much as digits as its factorization.

1926157139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 44.

The square root of 1926157139 is about 43888.0067786178. The cubic root of 1926157139 is about 1244.2201723853.

The spelling of 1926157139 in words is "one billion, nine hundred twenty-six million, one hundred fifty-seven thousand, one hundred thirty-nine".