1023657983 has 4 divisors (see below), whose sum is σ = 1024959480. Its totient is φ = 1022356488.

The previous prime is 1023657977. The next prime is 1023657997. The reversal of 1023657983 is 3897563201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3897563201 = 7 ⋅556794743.

It is a cyclic number.

It is not a de Polignac number, because 1023657983 - 2⁶ = 1023657919 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 (1023657923) 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, 649568 + ... + 651141.

It is an arithmetic number, because the mean of its divisors is an integer number (256239870).

Almost surely, 2^1023657983 is an apocalyptic number.

1023657983 is a deficient number, since it is larger than the sum of its proper divisors (1301497).

1023657983 is an equidigital number, since it uses as much as digits as its factorization.

1023657983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301496.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 1023657983 is about 31994.6555380739. The cubic root of 1023657983 is about 1007.8246101237.

The spelling of 1023657983 in words is "one billion, twenty-three million, six hundred fifty-seven thousand, nine hundred eighty-three".