121589998 has 8 divisors (see below), whose sum is σ = 188268480. Its totient is φ = 58833840.

The previous prime is 121589989. The next prime is 121589999. The reversal of 121589998 is 899985121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×121589998² = 29568255227280008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121589999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980503 + ... + 980626.

It is an arithmetic number, because the mean of its divisors is an integer number (23533560).

Almost surely, 2^121589998 is an apocalyptic number.

121589998 is a deficient number, since it is larger than the sum of its proper divisors (66678482).

121589998 is a wasteful number, since it uses less digits than its factorization.

121589998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961162.

The product of its digits is 466560, while the sum is 52.

The square root of 121589998 is about 11026.7854790052. The cubic root of 121589998 is about 495.4113480362.

The spelling of 121589998 in words is "one hundred twenty-one million, five hundred eighty-nine thousand, nine hundred ninety-eight".