190780997 has 8 divisors (see below), whose sum is σ = 208340832. Its totient is φ = 173257200.

The previous prime is 190780969. The next prime is 190780999. The reversal of 190780997 is 799087091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 190780997 - 2⁸ = 190780741 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190780999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2738 + ... + 19724.

It is an arithmetic number, because the mean of its divisors is an integer number (26042604).

Almost surely, 2^190780997 is an apocalyptic number.

It is an amenable number.

190780997 is a deficient number, since it is larger than the sum of its proper divisors (17559835).

190780997 is a wasteful number, since it uses less digits than its factorization.

190780997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18019.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 190780997 is about 13812.3494380934. The cubic root of 190780997 is about 575.6763278058.

It can be divided in two parts, 190 and 780997, that added together give a palindrome (781187).

The spelling of 190780997 in words is "one hundred ninety million, seven hundred eighty thousand, nine hundred ninety-seven".