190977145 has 4 divisors (see below), whose sum is σ = 229172580. Its totient is φ = 152781712.

The previous prime is 190977103. The next prime is 190977161. The reversal of 190977145 is 541779091.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37613689 + 153363456 = 6133^2 + 12384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190977145 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19097710 + ... + 19097719.

It is an arithmetic number, because the mean of its divisors is an integer number (57293145).

Almost surely, 2^190977145 is an apocalyptic number.

It is an amenable number.

190977145 is a deficient number, since it is larger than the sum of its proper divisors (38195435).

190977145 is an equidigital number, since it uses as much as digits as its factorization.

190977145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38195434.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 190977145 is about 13819.4480714680. The cubic root of 190977145 is about 575.8735506007.

The spelling of 190977145 in words is "one hundred ninety million, nine hundred seventy-seven thousand, one hundred forty-five".