97213642 has 4 divisors (see below), whose sum is σ = 145820466. Its totient is φ = 48606820.

The previous prime is 97213639. The next prime is 97213643. The reversal of 97213642 is 24631279.

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

It can be written as a sum of positive squares in only one way, i.e., 50851161 + 46362481 = 7131^2 + 6809^2 .

It is a junction number, because it is equal to n+sod(n) for n = 97213598 and 97213607.

It is not an unprimeable number, because it can be changed into a prime (97213643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24303409 + ... + 24303412.

Almost surely, 2^97213642 is an apocalyptic number.

97213642 is a deficient number, since it is larger than the sum of its proper divisors (48606824).

97213642 is a wasteful number, since it uses less digits than its factorization.

97213642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48606823.

The product of its digits is 18144, while the sum is 34.

The square root of 97213642 is about 9859.6978655535. The cubic root of 97213642 is about 459.8071687041.

The spelling of 97213642 in words is "ninety-seven million, two hundred thirteen thousand, six hundred forty-two".