1039998961 has 2 divisors, whose sum is σ = 1039998962. Its totient is φ = 1039998960.

The previous prime is 1039998941. The next prime is 1039998979. The reversal of 1039998961 is 1698999301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 685392400 + 354606561 = 26180^2 + 18831^2 .

It is a cyclic number.

It is not a de Polignac number, because 1039998961 - 2¹⁷ = 1039867889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1039998901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519999480 + 519999481.

It is an arithmetic number, because the mean of its divisors is an integer number (519999481).

Almost surely, 2^1039998961 is an apocalyptic number.

It is an amenable number.

1039998961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039998961 is an equidigital number, since it uses as much as digits as its factorization.

1039998961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 55.

The square root of 1039998961 is about 32249.0148841790. The cubic root of 1039998961 is about 1013.1590664250.

It can be divided in two parts, 1039 and 998961, that added together give a 6-th power (1000000 = 10⁶).

The spelling of 1039998961 in words is "one billion, thirty-nine million, nine hundred ninety-eight thousand, nine hundred sixty-one".