97213678 has 4 divisors (see below), whose sum is σ = 145820520. Its totient is φ = 48606838.

The previous prime is 97213643. The next prime is 97213679. The reversal of 97213678 is 87631279.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97213679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24303418 + ... + 24303421.

It is an arithmetic number, because the mean of its divisors is an integer number (36455130).

Almost surely, 2^97213678 is an apocalyptic number.

97213678 is a deficient number, since it is larger than the sum of its proper divisors (48606842).

97213678 is a wasteful number, since it uses less digits than its factorization.

97213678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48606841.

The product of its digits is 127008, while the sum is 43.

The square root of 97213678 is about 9859.6996911671. The cubic root of 97213678 is about 459.8072254625.

The spelling of 97213678 in words is "ninety-seven million, two hundred thirteen thousand, six hundred seventy-eight".