997350031 has 2 divisors, whose sum is σ = 997350032. Its totient is φ = 997350030.

The previous prime is 997349963. The next prime is 997350077. The reversal of 997350031 is 130053799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997350031 - 2⁹ = 997349519 is a prime.

It is a super-2 number, since 2×997350031² = 1989414168671401922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997350931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498675015 + 498675016.

It is an arithmetic number, because the mean of its divisors is an integer number (498675016).

Almost surely, 2^997350031 is an apocalyptic number.

997350031 is a deficient number, since it is larger than the sum of its proper divisors (1).

997350031 is an equidigital number, since it uses as much as digits as its factorization.

997350031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25515, while the sum is 37.

The square root of 997350031 is about 31580.8491177802. The cubic root of 997350031 is about 999.1158955897.

The spelling of 997350031 in words is "nine hundred ninety-seven million, three hundred fifty thousand, thirty-one".