121549867 has 2 divisors, whose sum is σ = 121549868. Its totient is φ = 121549866.

The previous prime is 121549837. The next prime is 121549873. The reversal of 121549867 is 768945121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121549867 is a prime.

It is not a weakly prime, because it can be changed into another prime (121549837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60774933 + 60774934.

It is an arithmetic number, because the mean of its divisors is an integer number (60774934).

Almost surely, 2^121549867 is an apocalyptic number.

121549867 is a deficient number, since it is larger than the sum of its proper divisors (1).

121549867 is an equidigital number, since it uses as much as digits as its factorization.

121549867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 121549867 is about 11024.9656235292. The cubic root of 121549867 is about 495.3568382332.

The spelling of 121549867 in words is "one hundred twenty-one million, five hundred forty-nine thousand, eight hundred sixty-seven".