245955977 has 2 divisors, whose sum is σ = 245955978. Its totient is φ = 245955976.

The previous prime is 245955973. The next prime is 245955979. The reversal of 245955977 is 779559542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235039561 + 10916416 = 15331^2 + 3304^2 .

It is a cyclic number.

It is not a de Polignac number, because 245955977 - 2² = 245955973 is a prime.

Together with 245955979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (245955971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122977988 + 122977989.

It is an arithmetic number, because the mean of its divisors is an integer number (122977989).

Almost surely, 2^245955977 is an apocalyptic number.

It is an amenable number.

245955977 is a deficient number, since it is larger than the sum of its proper divisors (1).

245955977 is an equidigital number, since it uses as much as digits as its factorization.

245955977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3969000, while the sum is 53.

The square root of 245955977 is about 15682.9836765840. The cubic root of 245955977 is about 626.5452766169.

The spelling of 245955977 in words is "two hundred forty-five million, nine hundred fifty-five thousand, nine hundred seventy-seven".