999413431 has 2 divisors, whose sum is σ = 999413432. Its totient is φ = 999413430.

The previous prime is 999413381. The next prime is 999413533. The reversal of 999413431 is 134314999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999413431 - 2²¹ = 997316279 is a prime.

It is a super-2 number, since 2×999413431² = 1997654412126383522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999413231) 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, 499706715 + 499706716.

It is an arithmetic number, because the mean of its divisors is an integer number (499706716).

Almost surely, 2^999413431 is an apocalyptic number.

999413431 is a deficient number, since it is larger than the sum of its proper divisors (1).

999413431 is an equidigital number, since it uses as much as digits as its factorization.

999413431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 43.

The square root of 999413431 is about 31613.5007710314. The cubic root of 999413431 is about 999.8044387583.

The spelling of 999413431 in words is "nine hundred ninety-nine million, four hundred thirteen thousand, four hundred thirty-one".