121928577 has 8 divisors (see below), whose sum is σ = 164530464. Its totient is φ = 80306208.

The previous prime is 121928551. The next prime is 121928593. The reversal of 121928577 is 775829121.

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

It is not a de Polignac number, because 121928577 - 2⁷ = 121928449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121928077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244588 + ... + 245085.

It is an arithmetic number, because the mean of its divisors is an integer number (20566308).

Almost surely, 2^121928577 is an apocalyptic number.

It is an amenable number.

121928577 is a deficient number, since it is larger than the sum of its proper divisors (42601887).

121928577 is an equidigital number, since it uses as much as digits as its factorization.

121928577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489759.

The product of its digits is 70560, while the sum is 42.

The square root of 121928577 is about 11042.1273765520. The cubic root of 121928577 is about 495.8707619950.

The spelling of 121928577 in words is "one hundred twenty-one million, nine hundred twenty-eight thousand, five hundred seventy-seven".