121619906 has 16 divisors (see below), whose sum is σ = 190992384. Its totient is φ = 57973344.

The previous prime is 121619863. The next prime is 121619917. The reversal of 121619906 is 609916121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10175 + ... + 18621.

It is an arithmetic number, because the mean of its divisors is an integer number (11937024).

Almost surely, 2^121619906 is an apocalyptic number.

121619906 is a deficient number, since it is larger than the sum of its proper divisors (69372478).

121619906 is a wasteful number, since it uses less digits than its factorization.

121619906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8785.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 121619906 is about 11028.1415478765. The cubic root of 121619906 is about 495.4519641728.

The spelling of 121619906 in words is "one hundred twenty-one million, six hundred nineteen thousand, nine hundred six".