1919099997 has 24 divisors (see below), whose sum is σ = 2989109760. Its totient is φ = 1182496320.

The previous prime is 1919099983. The next prime is 1919099999. The reversal of 1919099997 is 7999909191.

It is not a de Polignac number, because 1919099997 - 2²⁶ = 1851991133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919099999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129853 + ... + 143874.

It is an arithmetic number, because the mean of its divisors is an integer number (124546240).

Almost surely, 2^1919099997 is an apocalyptic number.

It is an amenable number.

1919099997 is a deficient number, since it is larger than the sum of its proper divisors (1070009763).

1919099997 is a wasteful number, since it uses less digits than its factorization.

1919099997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273793 (or 273790 counting only the distinct ones).

The product of its (nonzero) digits is 3720087, while the sum is 63.

The square root of 1919099997 is about 43807.5335644453. The cubic root of 1919099997 is about 1242.6987693504.

The spelling of 1919099997 in words is "one billion, nine hundred nineteen million, ninety-nine thousand, nine hundred ninety-seven".