97897999 has 2 divisors, whose sum is σ = 97898000. Its totient is φ = 97897998.

The previous prime is 97897973. The next prime is 97898033. The reversal of 97897999 is 99979879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97897999 - 2¹¹ = 97895951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97897199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48948999 + 48949000.

It is an arithmetic number, because the mean of its divisors is an integer number (48949000).

Almost surely, 2^97897999 is an apocalyptic number.

97897999 is a deficient number, since it is larger than the sum of its proper divisors (1).

97897999 is an equidigital number, since it uses as much as digits as its factorization.

97897999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23147208, while the sum is 67.

The square root of 97897999 is about 9894.3417668888. The cubic root of 97897999 is about 460.8836181981.

The spelling of 97897999 in words is "ninety-seven million, eight hundred ninety-seven thousand, nine hundred ninety-nine".