97435899391 has 4 divisors (see below), whose sum is σ = 99812384784. Its totient is φ = 95059414000.

The previous prime is 97435899383. The next prime is 97435899397. The reversal of 97435899391 is 19399853479.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97435899391 - 2³ = 97435899383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97435899397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188242635 + ... + 1188242716.

It is an arithmetic number, because the mean of its divisors is an integer number (24953096196).

Almost surely, 2^97435899391 is an apocalyptic number.

97435899391 is a deficient number, since it is larger than the sum of its proper divisors (2376485393).

97435899391 is a wasteful number, since it uses less digits than its factorization.

97435899391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376485392.

The product of its digits is 66134880, while the sum is 67.

The spelling of 97435899391 in words is "ninety-seven billion, four hundred thirty-five million, eight hundred ninety-nine thousand, three hundred ninety-one".