190786945 has 4 divisors (see below), whose sum is σ = 228944340. Its totient is φ = 152629552.

The previous prime is 190786933. The next prime is 190786957. The reversal of 190786945 is 549687091.

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

It is an interprime number because it is at equal distance from previous prime (190786933) and next prime (190786957).

It can be written as a sum of positive squares in 2 ways, for example, as 76895361 + 113891584 = 8769^2 + 10672^2 .

It is a cyclic number.

It is not a de Polignac number, because 190786945 - 2⁵ = 190786913 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19078690 + ... + 19078699.

It is an arithmetic number, because the mean of its divisors is an integer number (57236085).

Almost surely, 2^190786945 is an apocalyptic number.

It is an amenable number.

190786945 is a deficient number, since it is larger than the sum of its proper divisors (38157395).

190786945 is an equidigital number, since it uses as much as digits as its factorization.

190786945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38157394.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 190786945 is about 13812.5647509795. The cubic root of 190786945 is about 575.6823103849.

The spelling of 190786945 in words is "one hundred ninety million, seven hundred eighty-six thousand, nine hundred forty-five".