97821803 has 2 divisors, whose sum is σ = 97821804. Its totient is φ = 97821802.

The previous prime is 97821799. The next prime is 97821817. The reversal of 97821803 is 30812879.

It is a weak prime.

It is an emirp because it is prime and its reverse (30812879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97821803 - 2² = 97821799 is a prime.

It is not a weakly prime, because it can be changed into another prime (97821103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48910901 + 48910902.

It is an arithmetic number, because the mean of its divisors is an integer number (48910902).

Almost surely, 2^97821803 is an apocalyptic number.

97821803 is a deficient number, since it is larger than the sum of its proper divisors (1).

97821803 is an equidigital number, since it uses as much as digits as its factorization.

97821803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 97821803 is about 9890.4905338411. The cubic root of 97821803 is about 460.7640154709.

The spelling of 97821803 in words is "ninety-seven million, eight hundred twenty-one thousand, eight hundred three".