1920199497 has 16 divisors (see below), whose sum is σ = 2584108800. Its totient is φ = 1268265600.

The previous prime is 1920199493. The next prime is 1920199499. The reversal of 1920199497 is 7949910291.

It is not a de Polignac number, because 1920199497 - 2² = 1920199493 is a prime.

It is a super-2 number, since 2×1920199497² = 7374332216558106018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1920199493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140629 + ... + 153677.

It is an arithmetic number, because the mean of its divisors is an integer number (161506800).

Almost surely, 2^1920199497 is an apocalyptic number.

It is an amenable number.

1920199497 is a deficient number, since it is larger than the sum of its proper divisors (663909303).

1920199497 is a wasteful number, since it uses less digits than its factorization.

1920199497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13504.

The product of its (nonzero) digits is 367416, while the sum is 51.

The square root of 1920199497 is about 43820.0809789302. The cubic root of 1920199497 is about 1242.9360483604.

The spelling of 1920199497 in words is "one billion, nine hundred twenty million, one hundred ninety-nine thousand, four hundred ninety-seven".