190388899 has 4 divisors (see below), whose sum is σ = 201588264. Its totient is φ = 179189536.

The previous prime is 190388897. The next prime is 190388909. The reversal of 190388899 is 998883091.

190388899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998883091 = 8447 ⋅118253.

It is a cyclic number.

It is not a de Polignac number, because 190388899 - 2¹ = 190388897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190388897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5599657 + ... + 5599690.

It is an arithmetic number, because the mean of its divisors is an integer number (50397066).

Almost surely, 2^190388899 is an apocalyptic number.

190388899 is a deficient number, since it is larger than the sum of its proper divisors (11199365).

190388899 is a wasteful number, since it uses less digits than its factorization.

190388899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11199364.

The product of its (nonzero) digits is 1119744, while the sum is 55.

The square root of 190388899 is about 13798.1483902732. The cubic root of 190388899 is about 575.2816757294.

The spelling of 190388899 in words is "one hundred ninety million, three hundred eighty-eight thousand, eight hundred ninety-nine".