97278901 has 2 divisors, whose sum is σ = 97278902. Its totient is φ = 97278900.

The previous prime is 97278893. The next prime is 97278911. The reversal of 97278901 is 10987279.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59444100 + 37834801 = 7710^2 + 6151^2 .

It is an emirp because it is prime and its reverse (10987279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97278901 - 2³ = 97278893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97278911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48639450 + 48639451.

It is an arithmetic number, because the mean of its divisors is an integer number (48639451).

Almost surely, 2^97278901 is an apocalyptic number.

It is an amenable number.

97278901 is a deficient number, since it is larger than the sum of its proper divisors (1).

97278901 is an equidigital number, since it uses as much as digits as its factorization.

97278901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 97278901 is about 9863.0066916737. The cubic root of 97278901 is about 459.9100343908.

The spelling of 97278901 in words is "ninety-seven million, two hundred seventy-eight thousand, nine hundred one".