121997386 has 32 divisors (see below), whose sum is σ = 215332992. Its totient is φ = 50749440.

The previous prime is 121997371. The next prime is 121997387. The reversal of 121997386 is 683799121.

It is a happy number.

Its product of digits (163296) is a multiple of the sum of its prime divisors (1134).

It is not an unprimeable number, because it can be changed into a prime (121997387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147105 + ... + 147931.

It is an arithmetic number, because the mean of its divisors is an integer number (6729156).

Almost surely, 2^121997386 is an apocalyptic number.

121997386 is a deficient number, since it is larger than the sum of its proper divisors (93335606).

121997386 is a wasteful number, since it uses less digits than its factorization.

121997386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134.

The product of its digits is 163296, while the sum is 46.

The square root of 121997386 is about 11045.2426863333. The cubic root of 121997386 is about 495.9640241206.

The spelling of 121997386 in words is "one hundred twenty-one million, nine hundred ninety-seven thousand, three hundred eighty-six".