121608690 has 48 divisors (see below), whose sum is σ = 339515712. Its totient is φ = 27795936.

The previous prime is 121608689. The next prime is 121608703. The reversal of 121608690 is 96806121.

It is a super-2 number, since 2×121608690² = 29577346967032200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39894 + ... + 42833.

It is an arithmetic number, because the mean of its divisors is an integer number (7073244).

Almost surely, 2^121608690 is an apocalyptic number.

121608690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121608690 is an abundant number, since it is smaller than the sum of its proper divisors (217907022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121608690 is a wasteful number, since it uses less digits than its factorization.

121608690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82751 (or 82744 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 121608690 is about 11027.6330189212. The cubic root of 121608690 is about 495.4367332230.

The spelling of 121608690 in words is "one hundred twenty-one million, six hundred eight thousand, six hundred ninety".