1919712807 has 12 divisors (see below), whose sum is σ = 2774838040. Its totient is φ = 1278922608.

The previous prime is 1919712803. The next prime is 1919712827. The reversal of 1919712807 is 7082179191.

It is a happy number.

It is not a de Polignac number, because 1919712807 - 2² = 1919712803 is a prime.

It is a super-2 number, since 2×1919712807² = 7370594522719638498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919712803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59968 + ... + 86229.

Almost surely, 2^1919712807 is an apocalyptic number.

1919712807 is a deficient number, since it is larger than the sum of its proper divisors (855125233).

1919712807 is a wasteful number, since it uses less digits than its factorization.

1919712807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147662 (or 147659 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 45.

The square root of 1919712807 is about 43814.5273510967. The cubic root of 1919712807 is about 1242.8310287758.

The spelling of 1919712807 in words is "one billion, nine hundred nineteen million, seven hundred twelve thousand, eight hundred seven".