1031499979 has 2 divisors, whose sum is σ = 1031499980. Its totient is φ = 1031499978.

The previous prime is 1031499977. The next prime is 1031500069. The reversal of 1031499979 is 9799941301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1031499979 - 2¹ = 1031499977 is a prime.

Together with 1031499977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1031499977) 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, 515749989 + 515749990.

It is an arithmetic number, because the mean of its divisors is an integer number (515749990).

Almost surely, 2^1031499979 is an apocalyptic number.

1031499979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031499979 is an equidigital number, since it uses as much as digits as its factorization.

1031499979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 551124, while the sum is 52.

The square root of 1031499979 is about 32116.9733785735. The cubic root of 1031499979 is about 1010.3916329150.

The spelling of 1031499979 in words is "one billion, thirty-one million, four hundred ninety-nine thousand, nine hundred seventy-nine".