1023123931 has 2 divisors, whose sum is σ = 1023123932. Its totient is φ = 1023123930.

The previous prime is 1023123923. The next prime is 1023123947. The reversal of 1023123931 is 1393213201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1023123931 - 2³ = 1023123923 is a prime.

It is a super-2 number, since 2×1023123931² = 2093565156369785522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1023123896 and 1023123905.

It is not a weakly prime, because it can be changed into another prime (1023123911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511561965 + 511561966.

It is an arithmetic number, because the mean of its divisors is an integer number (511561966).

Almost surely, 2^1023123931 is an apocalyptic number.

1023123931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023123931 is an equidigital number, since it uses as much as digits as its factorization.

1023123931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1023123931 is about 31986.3084928536. The cubic root of 1023123931 is about 1007.6493157758.

The spelling of 1023123931 in words is "one billion, twenty-three million, one hundred twenty-three thousand, nine hundred thirty-one".