1919899429 has 6 divisors (see below), whose sum is σ = 2233352454. Its totient is φ = 1645628040.

The previous prime is 1919899363. The next prime is 1919899433. The reversal of 1919899429 is 9249989191.

It can be written as a sum of positive squares in only one way, i.e., 1741142529 + 178756900 = 41727^2 + 13370^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1919899429 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 (1919899439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19590762 + ... + 19590859.

It is an arithmetic number, because the mean of its divisors is an integer number (372225409).

Almost surely, 2^1919899429 is an apocalyptic number.

It is an amenable number.

1919899429 is a deficient number, since it is larger than the sum of its proper divisors (313453025).

1919899429 is an equidigital number, since it uses as much as digits as its factorization.

1919899429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39181635 (or 39181628 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 61.

The square root of 1919899429 is about 43816.6569811071. The cubic root of 1919899429 is about 1242.8713007887.

The spelling of 1919899429 in words is "one billion, nine hundred nineteen million, eight hundred ninety-nine thousand, four hundred twenty-nine".