190977 has 4 divisors (see below), whose sum is σ = 254640. Its totient is φ = 127316.

The previous prime is 190921. The next prime is 190979. The reversal of 190977 is 779091.

190977 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 779091 = 3 ⋅259697.

It is a cyclic number.

It is not a de Polignac number, because 190977 - 2⁶ = 190913 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (190979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31827 + ... + 31832.

It is an arithmetic number, because the mean of its divisors is an integer number (63660).

It is a Proth number, since it is equal to 373 ⋅ 2⁹ + 1 and 373 < 2⁹.

2¹⁹⁰⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

190977 is a deficient number, since it is larger than the sum of its proper divisors (63663).

190977 is an equidigital number, since it uses as much as digits as its factorization.

190977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63662.

The product of its (nonzero) digits is 3969, while the sum is 33.

The square root of 190977 is about 437.0091532222. The cubic root of 190977 is about 57.5873404856.

The spelling of 190977 in words is "one hundred ninety thousand, nine hundred seventy-seven".