1020423031 has 2 divisors, whose sum is σ = 1020423032. Its totient is φ = 1020423030.

The previous prime is 1020423023. The next prime is 1020423097. The reversal of 1020423031 is 1303240201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020423031 - 2³ = 1020423023 is a prime.

It is a super-2 number, since 2×1020423031² = 2082526324390453922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020422996 and 1020423014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020420031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510211515 + 510211516.

It is an arithmetic number, because the mean of its divisors is an integer number (510211516).

Almost surely, 2^1020423031 is an apocalyptic number.

1020423031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020423031 is an equidigital number, since it uses as much as digits as its factorization.

1020423031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1020423031 is about 31944.0609660074. The cubic root of 1020423031 is about 1006.7618513103.

Adding to 1020423031 its reverse (1303240201), we get a palindrome (2323663232).

The spelling of 1020423031 in words is "one billion, twenty million, four hundred twenty-three thousand, thirty-one".