97828231 has 2 divisors, whose sum is σ = 97828232. Its totient is φ = 97828230.

The previous prime is 97828229. The next prime is 97828253. The reversal of 97828231 is 13282879.

It is a weak prime.

It is an emirp because it is prime and its reverse (13282879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97828231 - 2¹ = 97828229 is a prime.

It is a super-2 number, since 2×97828231² = 19140725561178722, which contains 22 as substring.

Together with 97828229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97828261) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48914115 + 48914116.

It is an arithmetic number, because the mean of its divisors is an integer number (48914116).

Almost surely, 2^97828231 is an apocalyptic number.

97828231 is a deficient number, since it is larger than the sum of its proper divisors (1).

97828231 is an equidigital number, since it uses as much as digits as its factorization.

97828231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 97828231 is about 9890.8154871072. The cubic root of 97828231 is about 460.7741077207.

The spelling of 97828231 in words is "ninety-seven million, eight hundred twenty-eight thousand, two hundred thirty-one".