1005031399 has 2 divisors, whose sum is σ = 1005031400. Its totient is φ = 1005031398.

The previous prime is 1005031367. The next prime is 1005031427. The reversal of 1005031399 is 9931305001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1005031399 - 2⁵ = 1005031367 is a prime.

It is a super-2 number, since 2×1005031399² = 2020176225951794402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1005031399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005031309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502515699 + 502515700.

It is an arithmetic number, because the mean of its divisors is an integer number (502515700).

Almost surely, 2^1005031399 is an apocalyptic number.

1005031399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005031399 is an equidigital number, since it uses as much as digits as its factorization.

1005031399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 1005031399 is about 31702.2301896885. The cubic root of 1005031399 is about 1001.6743280610.

The spelling of 1005031399 in words is "one billion, five million, thirty-one thousand, three hundred ninety-nine".