121990964 has 6 divisors (see below), whose sum is σ = 213484194. Its totient is φ = 60995480.

The previous prime is 121990951. The next prime is 121991003. The reversal of 121990964 is 469099121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 121440400 + 550564 = 11020^2 + 742^2 .

It is a super-3 number, since 3×121990964³ (a number of 25 digits) contains 333 as substring.

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, 15248867 + ... + 15248874.

It is an arithmetic number, because the mean of its divisors is an integer number (35580699).

Almost surely, 2^121990964 is an apocalyptic number.

It is an amenable number.

121990964 is a deficient number, since it is larger than the sum of its proper divisors (91493230).

121990964 is a wasteful number, since it uses less digits than its factorization.

121990964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30497745 (or 30497743 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 121990964 is about 11044.9519691124. The cubic root of 121990964 is about 495.9553213745.

The spelling of 121990964 in words is "one hundred twenty-one million, nine hundred ninety thousand, nine hundred sixty-four".