242191877 has 4 divisors (see below), whose sum is σ = 256438476. Its totient is φ = 227945280.

The previous prime is 242191849. The next prime is 242191891. The reversal of 242191877 is 778191242.

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 112550881 + 129640996 = 10609^2 + 11386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242191877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242191897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7123274 + ... + 7123307.

It is an arithmetic number, because the mean of its divisors is an integer number (64109619).

Almost surely, 2^242191877 is an apocalyptic number.

It is an amenable number.

242191877 is a deficient number, since it is larger than the sum of its proper divisors (14246599).

242191877 is a wasteful number, since it uses less digits than its factorization.

242191877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14246598.

The product of its digits is 56448, while the sum is 41.

The square root of 242191877 is about 15562.5151244906. The cubic root of 242191877 is about 623.3326241012.

The spelling of 242191877 in words is "two hundred forty-two million, one hundred ninety-one thousand, eight hundred seventy-seven".