1067991949 has 2 divisors, whose sum is σ = 1067991950. Its totient is φ = 1067991948.

The previous prime is 1067991937. The next prime is 1067991973. The reversal of 1067991949 is 9491997601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 650607049 + 417384900 = 25507^2 + 20430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1067991949 - 2⁵ = 1067991917 is a prime.

It is a super-2 number, since 2×1067991949² = 2281213606257637202, 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 1067991949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1067991929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533995974 + 533995975.

It is an arithmetic number, because the mean of its divisors is an integer number (533995975).

Almost surely, 2^1067991949 is an apocalyptic number.

It is an amenable number.

1067991949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1067991949 is an equidigital number, since it uses as much as digits as its factorization.

1067991949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The square root of 1067991949 is about 32680.1460982046. The cubic root of 1067991949 is about 1022.1688915418.

The spelling of 1067991949 in words is "one billion, sixty-seven million, nine hundred ninety-one thousand, nine hundred forty-nine".