97449421 has 2 divisors, whose sum is σ = 97449422. Its totient is φ = 97449420.

The previous prime is 97449419. The next prime is 97449437. The reversal of 97449421 is 12494479.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56040196 + 41409225 = 7486^2 + 6435^2 .

It is an emirp because it is prime and its reverse (12494479) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97449421 - 2¹ = 97449419 is a prime.

Together with 97449419, 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 (97429421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48724710 + 48724711.

It is an arithmetic number, because the mean of its divisors is an integer number (48724711).

Almost surely, 2^97449421 is an apocalyptic number.

It is an amenable number.

97449421 is a deficient number, since it is larger than the sum of its proper divisors (1).

97449421 is an equidigital number, since it uses as much as digits as its factorization.

97449421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 97449421 is about 9871.6473296001. The cubic root of 97449421 is about 460.1786026682.

The spelling of 97449421 in words is "ninety-seven million, four hundred forty-nine thousand, four hundred twenty-one".