1011998929 has 2 divisors, whose sum is σ = 1011998930. Its totient is φ = 1011998928.

The previous prime is 1011998909. The next prime is 1011998947. The reversal of 1011998929 is 9298991101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 611078400 + 400920529 = 24720^2 + 20023^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011998929 - 2¹⁵ = 1011966161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011998909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505999464 + 505999465.

It is an arithmetic number, because the mean of its divisors is an integer number (505999465).

Almost surely, 2^1011998929 is an apocalyptic number.

It is an amenable number.

1011998929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011998929 is an equidigital number, since it uses as much as digits as its factorization.

1011998929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 49.

The square root of 1011998929 is about 31811.9306078710. The cubic root of 1011998929 is about 1003.9837516484.

The spelling of 1011998929 in words is "one billion, eleven million, nine hundred ninety-eight thousand, nine hundred twenty-nine".