97878413 has 2 divisors, whose sum is σ = 97878414. Its totient is φ = 97878412.

The previous prime is 97878371. The next prime is 97878419. The reversal of 97878413 is 31487879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97259044 + 619369 = 9862^2 + 787^2 .

It is a cyclic number.

It is not a de Polignac number, because 97878413 - 2¹⁰ = 97877389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97878419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48939206 + 48939207.

It is an arithmetic number, because the mean of its divisors is an integer number (48939207).

Almost surely, 2^97878413 is an apocalyptic number.

It is an amenable number.

97878413 is a deficient number, since it is larger than the sum of its proper divisors (1).

97878413 is an equidigital number, since it uses as much as digits as its factorization.

97878413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 47.

The square root of 97878413 is about 9893.3519597758. The cubic root of 97878413 is about 460.8528805300.

The spelling of 97878413 in words is "ninety-seven million, eight hundred seventy-eight thousand, four hundred thirteen".