1031012399 has 2 divisors, whose sum is σ = 1031012400. Its totient is φ = 1031012398.

The previous prime is 1031012393. The next prime is 1031012417. The reversal of 1031012399 is 9932101301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1031012399 - 2¹⁶ = 1030946863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031012393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515506199 + 515506200.

It is an arithmetic number, because the mean of its divisors is an integer number (515506200).

Almost surely, 2^1031012399 is an apocalyptic number.

1031012399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031012399 is an equidigital number, since it uses as much as digits as its factorization.

1031012399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1031012399 is about 32109.3817909968. The cubic root of 1031012399 is about 1010.2324070607.

The spelling of 1031012399 in words is "one billion, thirty-one million, twelve thousand, three hundred ninety-nine".