8931997 has 2 divisors, whose sum is σ = 8931998. Its totient is φ = 8931996.

The previous prime is 8931983. The next prime is 8932009. The reversal of 8931997 is 7991398.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7778521 + 1153476 = 2789^2 + 1074^2 .

It is a cyclic number.

It is not a de Polignac number, because 8931997 - 2⁷ = 8931869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8931907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4465998 + 4465999.

It is an arithmetic number, because the mean of its divisors is an integer number (4465999).

Almost surely, 2^8931997 is an apocalyptic number.

It is an amenable number.

8931997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8931997 is an equidigital number, since it uses as much as digits as its factorization.

8931997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 46.

The square root of 8931997 is about 2988.6446761032. The cubic root of 8931997 is about 207.4831611632.

The spelling of 8931997 in words is "eight million, nine hundred thirty-one thousand, nine hundred ninety-seven".