121829479 has 4 divisors (see below), whose sum is σ = 121908600. Its totient is φ = 121750360.

The previous prime is 121829467. The next prime is 121829489. The reversal of 121829479 is 974928121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121829479 - 2⁵ = 121829447 is a prime.

It is a super-2 number, since 2×121829479² = 29684843906822882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121829489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37204 + ... + 40345.

It is an arithmetic number, because the mean of its divisors is an integer number (30477150).

Almost surely, 2^121829479 is an apocalyptic number.

121829479 is a deficient number, since it is larger than the sum of its proper divisors (79121).

121829479 is an equidigital number, since it uses as much as digits as its factorization.

121829479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79120.

The product of its digits is 72576, while the sum is 43.

The square root of 121829479 is about 11037.6391950453. The cubic root of 121829479 is about 495.7363851851.

The spelling of 121829479 in words is "one hundred twenty-one million, eight hundred twenty-nine thousand, four hundred seventy-nine".