121983479 has 2 divisors, whose sum is σ = 121983480. Its totient is φ = 121983478.

The previous prime is 121983473. The next prime is 121983493. The reversal of 121983479 is 974389121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121983479 - 2¹² = 121979383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121983473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60991739 + 60991740.

It is an arithmetic number, because the mean of its divisors is an integer number (60991740).

Almost surely, 2^121983479 is an apocalyptic number.

121983479 is a deficient number, since it is larger than the sum of its proper divisors (1).

121983479 is an equidigital number, since it uses as much as digits as its factorization.

121983479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 121983479 is about 11044.6131213366. The cubic root of 121983479 is about 495.9451777229.

The spelling of 121983479 in words is "one hundred twenty-one million, nine hundred eighty-three thousand, four hundred seventy-nine".