97438409 has 2 divisors, whose sum is σ = 97438410. Its totient is φ = 97438408.

The previous prime is 97438361. The next prime is 97438447. The reversal of 97438409 is 90483479.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96432400 + 1006009 = 9820^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 97438409 - 2⁸ = 97438153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97438409.

It is not a weakly prime, because it can be changed into another prime (97438499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48719204 + 48719205.

It is an arithmetic number, because the mean of its divisors is an integer number (48719205).

Almost surely, 2^97438409 is an apocalyptic number.

It is an amenable number.

97438409 is a deficient number, since it is larger than the sum of its proper divisors (1).

97438409 is an equidigital number, since it uses as much as digits as its factorization.

97438409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 97438409 is about 9871.0895548566. The cubic root of 97438409 is about 460.1612682822.

The spelling of 97438409 in words is "ninety-seven million, four hundred thirty-eight thousand, four hundred nine".