1015991983 has 2 divisors, whose sum is σ = 1015991984. Its totient is φ = 1015991982.

The previous prime is 1015991969. The next prime is 1015991987. The reversal of 1015991983 is 3891995101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1015991983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1015991987) 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, 507995991 + 507995992.

It is an arithmetic number, because the mean of its divisors is an integer number (507995992).

Almost surely, 2^1015991983 is an apocalyptic number.

1015991983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015991983 is an equidigital number, since it uses as much as digits as its factorization.

1015991983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 46.

The square root of 1015991983 is about 31874.6291429406. The cubic root of 1015991983 is about 1005.3024948526.

The spelling of 1015991983 in words is "one billion, fifteen million, nine hundred ninety-one thousand, nine hundred eighty-three".