97430491 has 2 divisors, whose sum is σ = 97430492. Its totient is φ = 97430490.

The previous prime is 97430467. The next prime is 97430497. The reversal of 97430491 is 19403479.

It is a strong prime.

It is an emirp because it is prime and its reverse (19403479) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97430491 - 2⁷ = 97430363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97430491.

It is not a weakly prime, because it can be changed into another prime (97430497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48715245 + 48715246.

It is an arithmetic number, because the mean of its divisors is an integer number (48715246).

Almost surely, 2^97430491 is an apocalyptic number.

97430491 is a deficient number, since it is larger than the sum of its proper divisors (1).

97430491 is an equidigital number, since it uses as much as digits as its factorization.

97430491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 97430491 is about 9870.6884764944. The cubic root of 97430491 is about 460.1488034658.

The spelling of 97430491 in words is "ninety-seven million, four hundred thirty thousand, four hundred ninety-one".