121283479 has 4 divisors (see below), whose sum is σ = 127666840. Its totient is φ = 114900120.

The previous prime is 121283473. The next prime is 121283489. The reversal of 121283479 is 974382121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974382121 = 3373 ⋅288877.

It is a cyclic number.

It is not a de Polignac number, because 121283479 - 2³ = 121283471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121283471) 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, 3191652 + ... + 3191689.

It is an arithmetic number, because the mean of its divisors is an integer number (31916710).

Almost surely, 2^121283479 is an apocalyptic number.

121283479 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121283479 is a deficient number, since it is larger than the sum of its proper divisors (6383361).

121283479 is an equidigital number, since it uses as much as digits as its factorization.

121283479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383360.

The product of its digits is 24192, while the sum is 37.

The square root of 121283479 is about 11012.8778709291. The cubic root of 121283479 is about 494.9946998038.

The spelling of 121283479 in words is "one hundred twenty-one million, two hundred eighty-three thousand, four hundred seventy-nine".