190520109 has 48 divisors (see below), whose sum is σ = 313342848. Its totient is φ = 110664576.

The previous prime is 190520089. The next prime is 190520131. The reversal of 190520109 is 901025091.

It is a happy number.

It is not a de Polignac number, because 190520109 - 2⁹ = 190519597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190520159) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 222927 + ... + 223779.

It is an arithmetic number, because the mean of its divisors is an integer number (6527976).

Almost surely, 2^190520109 is an apocalyptic number.

It is an amenable number.

190520109 is a deficient number, since it is larger than the sum of its proper divisors (122822739).

190520109 is a wasteful number, since it uses less digits than its factorization.

190520109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 190520109 is about 13802.9021948284. The cubic root of 190520109 is about 575.4138006862.

The spelling of 190520109 in words is "one hundred ninety million, five hundred twenty thousand, one hundred nine".