121971677 has 4 divisors (see below), whose sum is σ = 122584800. Its totient is φ = 121358556.

The previous prime is 121971649. The next prime is 121971683. The reversal of 121971677 is 776179121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 776179121 = 67 ⋅11584763.

It is a cyclic number.

It is not a de Polignac number, because 121971677 - 2¹² = 121967581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121971637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306263 + ... + 306660.

It is an arithmetic number, because the mean of its divisors is an integer number (30646200).

Almost surely, 2^121971677 is an apocalyptic number.

It is an amenable number.

121971677 is a deficient number, since it is larger than the sum of its proper divisors (613123).

121971677 is an equidigital number, since it uses as much as digits as its factorization.

121971677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613122.

The product of its digits is 37044, while the sum is 41.

The square root of 121971677 is about 11044.0788207980. The cubic root of 121971677 is about 495.9291828417.

The spelling of 121971677 in words is "one hundred twenty-one million, nine hundred seventy-one thousand, six hundred seventy-seven".