833398981 has 2 divisors, whose sum is σ = 833398982. Its totient is φ = 833398980.

The previous prime is 833398927. The next prime is 833398987. The reversal of 833398981 is 189893338.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 825642756 + 7756225 = 28734^2 + 2785^2 .

It is a cyclic number.

It is not a de Polignac number, because 833398981 - 2⁹ = 833398469 is a prime.

It is a super-2 number, since 2×833398981² = 1389107723063676722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (833398987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416699490 + 416699491.

It is an arithmetic number, because the mean of its divisors is an integer number (416699491).

Almost surely, 2^833398981 is an apocalyptic number.

It is an amenable number.

833398981 is a deficient number, since it is larger than the sum of its proper divisors (1).

833398981 is an equidigital number, since it uses as much as digits as its factorization.

833398981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 52.

The square root of 833398981 is about 28868.6504880294. The cubic root of 833398981 is about 941.0607389600.

The spelling of 833398981 in words is "eight hundred thirty-three million, three hundred ninety-eight thousand, nine hundred eighty-one".