249798077 has 4 divisors (see below), whose sum is σ = 250016256. Its totient is φ = 249579900.

The previous prime is 249798049. The next prime is 249798097. The reversal of 249798077 is 770897942.

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.

It is a cyclic number.

It is not a de Polignac number, because 249798077 - 2¹⁶ = 249732541 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 (249798037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107363 + ... + 109664.

It is an arithmetic number, because the mean of its divisors is an integer number (62504064).

Almost surely, 2^249798077 is an apocalyptic number.

It is an amenable number.

249798077 is a deficient number, since it is larger than the sum of its proper divisors (218179).

249798077 is a wasteful number, since it uses less digits than its factorization.

249798077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218178.

The product of its (nonzero) digits is 1778112, while the sum is 53.

The square root of 249798077 is about 15805.0016450489. The cubic root of 249798077 is about 629.7908745720.

The spelling of 249798077 in words is "two hundred forty-nine million, seven hundred ninety-eight thousand, seventy-seven".