97312778213 has 8 divisors (see below), whose sum is σ = 112554539328. Its totient is φ = 82406001024.

The previous prime is 97312778191. The next prime is 97312778273. The reversal of 97312778213 is 31287721379.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97312778213 - 2²⁶ = 97245669349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97312778273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83745356 + ... + 83746517.

It is an arithmetic number, because the mean of its divisors is an integer number (14069317416).

Almost surely, 2^97312778213 is an apocalyptic number.

It is an amenable number.

97312778213 is a deficient number, since it is larger than the sum of its proper divisors (15241761115).

97312778213 is a wasteful number, since it uses less digits than its factorization.

97312778213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167491963.

The product of its digits is 889056, while the sum is 50.

The spelling of 97312778213 in words is "ninety-seven billion, three hundred twelve million, seven hundred seventy-eight thousand, two hundred thirteen".