190669723906 has 4 divisors (see below), whose sum is σ = 286004585862. Its totient is φ = 95334861952.

The previous prime is 190669723903. The next prime is 190669723999. The reversal of 190669723906 is 609327966091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 161235174681 + 29434549225 = 401541^2 + 171565^2 .

It is a super-2 number, since 2×190669723906² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (190669723903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47667430975 + ... + 47667430978.

Almost surely, 2^190669723906 is an apocalyptic number.

190669723906 is a deficient number, since it is larger than the sum of its proper divisors (95334861956).

190669723906 is an equidigital number, since it uses as much as digits as its factorization.

190669723906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95334861955.

The product of its (nonzero) digits is 6613488, while the sum is 58.

The spelling of 190669723906 in words is "one hundred ninety billion, six hundred sixty-nine million, seven hundred twenty-three thousand, nine hundred six".