1031989949 has 2 divisors, whose sum is σ = 1031989950. Its totient is φ = 1031989948.

The previous prime is 1031989939. The next prime is 1031989961. The reversal of 1031989949 is 9499891301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1018248100 + 13741849 = 31910^2 + 3707^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031989949 - 2²⁴ = 1015212733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1031989949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031989909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515994974 + 515994975.

It is an arithmetic number, because the mean of its divisors is an integer number (515994975).

Almost surely, 2^1031989949 is an apocalyptic number.

It is an amenable number.

1031989949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031989949 is an equidigital number, since it uses as much as digits as its factorization.

1031989949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 53.

The square root of 1031989949 is about 32124.6003710552. The cubic root of 1031989949 is about 1010.5515887182.

The spelling of 1031989949 in words is "one billion, thirty-one million, nine hundred eighty-nine thousand, nine hundred forty-nine".