1919867047 has 6 divisors (see below), whose sum is σ = 2194266264. Its totient is φ = 1645500960.

The previous prime is 1919867041. The next prime is 1919867057. The reversal of 1919867047 is 7407689191.

It is not a de Polignac number, because 1919867047 - 2⁷ = 1919866919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1919866985 and 1919867003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919867041) 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, 107647 + ... + 124207.

It is an arithmetic number, because the mean of its divisors is an integer number (365711044).

Almost surely, 2^1919867047 is an apocalyptic number.

1919867047 is a deficient number, since it is larger than the sum of its proper divisors (274399217).

1919867047 is an frugal number, since it uses more digits than its factorization.

1919867047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33129 (or 16568 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 52.

The square root of 1919867047 is about 43816.2874625407. The cubic root of 1919867047 is about 1242.8643131163.

The spelling of 1919867047 in words is "one billion, nine hundred nineteen million, eight hundred sixty-seven thousand, forty-seven".