1023859979 has 2 divisors, whose sum is σ = 1023859980. Its totient is φ = 1023859978.

The previous prime is 1023859943. The next prime is 1023860053. The reversal of 1023859979 is 9799583201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1023859979 - 2¹² = 1023855883 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1023859979.

It is not a weakly prime, because it can be changed into another prime (1023859939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511929989 + 511929990.

It is an arithmetic number, because the mean of its divisors is an integer number (511929990).

Almost surely, 2^1023859979 is an apocalyptic number.

1023859979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023859979 is an equidigital number, since it uses as much as digits as its factorization.

1023859979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 1023859979 is about 31997.8120970794. The cubic root of 1023859979 is about 1007.8908963099.

The spelling of 1023859979 in words is "one billion, twenty-three million, eight hundred fifty-nine thousand, nine hundred seventy-nine".