121879563 has 8 divisors (see below), whose sum is σ = 175006608. Its totient is φ = 75002784.

The previous prime is 121879519. The next prime is 121879567. The reversal of 121879563 is 365978121.

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

It is not a de Polignac number, because 121879563 - 2¹³ = 121871371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121879567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562520 + ... + 1562597.

It is an arithmetic number, because the mean of its divisors is an integer number (21875826).

Almost surely, 2^121879563 is an apocalyptic number.

121879563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121879563 is a deficient number, since it is larger than the sum of its proper divisors (53127045).

121879563 is a wasteful number, since it uses less digits than its factorization.

121879563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125133.

The product of its digits is 90720, while the sum is 42.

The square root of 121879563 is about 11039.9077441797. The cubic root of 121879563 is about 495.8043081535.

The spelling of 121879563 in words is "one hundred twenty-one million, eight hundred seventy-nine thousand, five hundred sixty-three".