97873819 has 2 divisors, whose sum is σ = 97873820. Its totient is φ = 97873818.

The previous prime is 97873817. The next prime is 97873823. The reversal of 97873819 is 91837879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97873819 - 2¹ = 97873817 is a prime.

It is a super-2 number, since 2×97873819² = 19158568891289522, which contains 22 as substring.

Together with 97873817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (97873813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48936909 + 48936910.

It is an arithmetic number, because the mean of its divisors is an integer number (48936910).

Almost surely, 2^97873819 is an apocalyptic number.

97873819 is a deficient number, since it is larger than the sum of its proper divisors (1).

97873819 is an equidigital number, since it uses as much as digits as its factorization.

97873819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 52.

The square root of 97873819 is about 9893.1197809387. The cubic root of 97873819 is about 460.8456702535.

The spelling of 97873819 in words is "ninety-seven million, eight hundred seventy-three thousand, eight hundred nineteen".