1023657977 has 2 divisors, whose sum is σ = 1023657978. Its totient is φ = 1023657976.

The previous prime is 1023657961. The next prime is 1023657997. The reversal of 1023657977 is 7797563201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 838044601 + 185613376 = 28949^2 + 13624^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023657977 - 2⁴ = 1023657961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1023657917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511828988 + 511828989.

It is an arithmetic number, because the mean of its divisors is an integer number (511828989).

Almost surely, 2^1023657977 is an apocalyptic number.

It is an amenable number.

1023657977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023657977 is an equidigital number, since it uses as much as digits as its factorization.

1023657977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 555660, while the sum is 47.

The square root of 1023657977 is about 31994.6554443082. The cubic root of 1023657977 is about 1007.8246081547.

The spelling of 1023657977 in words is "one billion, twenty-three million, six hundred fifty-seven thousand, nine hundred seventy-seven".