121761867 has 4 divisors (see below), whose sum is σ = 162349160. Its totient is φ = 81174576.

The previous prime is 121761859. The next prime is 121761877. The reversal of 121761867 is 768167121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768167121 = 3 ⋅256055707.

It is not a de Polignac number, because 121761867 - 2³ = 121761859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121761877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20293642 + ... + 20293647.

It is an arithmetic number, because the mean of its divisors is an integer number (40587290).

Almost surely, 2^121761867 is an apocalyptic number.

121761867 is a deficient number, since it is larger than the sum of its proper divisors (40587293).

121761867 is an equidigital number, since it uses as much as digits as its factorization.

121761867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40587292.

The product of its digits is 28224, while the sum is 39.

The square root of 121761867 is about 11034.5759773541. The cubic root of 121761867 is about 495.6446615422.

The spelling of 121761867 in words is "one hundred twenty-one million, seven hundred sixty-one thousand, eight hundred sixty-seven".