121687964 has 6 divisors (see below), whose sum is σ = 212953944. Its totient is φ = 60843980.

The previous prime is 121687939. The next prime is 121687987. The reversal of 121687964 is 469786121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210992 + ... + 15210999.

It is an arithmetic number, because the mean of its divisors is an integer number (35492324).

Almost surely, 2^121687964 is an apocalyptic number.

It is an amenable number.

121687964 is a deficient number, since it is larger than the sum of its proper divisors (91265980).

121687964 is a wasteful number, since it uses less digits than its factorization.

121687964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30421995 (or 30421993 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 121687964 is about 11031.2267676809. The cubic root of 121687964 is about 495.5443645676.

The spelling of 121687964 in words is "one hundred twenty-one million, six hundred eighty-seven thousand, nine hundred sixty-four".