121649698 has 16 divisors (see below), whose sum is σ = 185480280. Its totient is φ = 59831296.

The previous prime is 121649687. The next prime is 121649699. The reversal of 121649698 is 896946121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50027329 + 71622369 = 7073^2 + 8463^2 .

It is not an unprimeable number, because it can be changed into a prime (121649699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28998 + ... + 32926.

Almost surely, 2^121649698 is an apocalyptic number.

121649698 is a deficient number, since it is larger than the sum of its proper divisors (63830582).

121649698 is a wasteful number, since it uses less digits than its factorization.

121649698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181.

The product of its digits is 186624, while the sum is 46.

The square root of 121649698 is about 11029.4921913930. The cubic root of 121649698 is about 495.4924161578.

The spelling of 121649698 in words is "one hundred twenty-one million, six hundred forty-nine thousand, six hundred ninety-eight".