97820386 has 4 divisors (see below), whose sum is σ = 146730582. Its totient is φ = 48910192.

The previous prime is 97820381. The next prime is 97820389. The reversal of 97820386 is 68302879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68302879 = 1381 ⋅49459.

It can be written as a sum of positive squares in only one way, i.e., 95433361 + 2387025 = 9769^2 + 1545^2 .

It is not an unprimeable number, because it can be changed into a prime (97820381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24455095 + ... + 24455098.

Almost surely, 2^97820386 is an apocalyptic number.

97820386 is a deficient number, since it is larger than the sum of its proper divisors (48910196).

97820386 is a wasteful number, since it uses less digits than its factorization.

97820386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48910195.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 97820386 is about 9890.4188991165. The cubic root of 97820386 is about 460.7617906575.

The spelling of 97820386 in words is "ninety-seven million, eight hundred twenty thousand, three hundred eighty-six".