997353571 has 2 divisors, whose sum is σ = 997353572. Its totient is φ = 997353570.

The previous prime is 997353563. The next prime is 997353593. The reversal of 997353571 is 175353799.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997353571 - 2³ = 997353563 is a prime.

It is not a weakly prime, because it can be changed into another prime (997351571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498676785 + 498676786.

It is an arithmetic number, because the mean of its divisors is an integer number (498676786).

Almost surely, 2^997353571 is an apocalyptic number.

997353571 is a deficient number, since it is larger than the sum of its proper divisors (1).

997353571 is an equidigital number, since it uses as much as digits as its factorization.

997353571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 893025, while the sum is 49.

The square root of 997353571 is about 31580.9051643552. The cubic root of 997353571 is about 999.1170776776.

The spelling of 997353571 in words is "nine hundred ninety-seven million, three hundred fifty-three thousand, five hundred seventy-one".