731106989 has 2 divisors, whose sum is σ = 731106990. Its totient is φ = 731106988.

The previous prime is 731106917. The next prime is 731107019. The reversal of 731106989 is 989601137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 405015625 + 326091364 = 20125^2 + 18058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-731106989 is a prime.

It is a super-2 number, since 2×731106989² = 1069034858729292242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (731100989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365553494 + 365553495.

It is an arithmetic number, because the mean of its divisors is an integer number (365553495).

Almost surely, 2^731106989 is an apocalyptic number.

It is an amenable number.

731106989 is a deficient number, since it is larger than the sum of its proper divisors (1).

731106989 is an equidigital number, since it uses as much as digits as its factorization.

731106989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 731106989 is about 27038.9901623563. The cubic root of 731106989 is about 900.8662396494.

The spelling of 731106989 in words is "seven hundred thirty-one million, one hundred six thousand, nine hundred eighty-nine".