121409783 has 8 divisors (see below), whose sum is σ = 132617856. Its totient is φ = 110230200.

The previous prime is 121409773. The next prime is 121409809. The reversal of 121409783 is 387904121.

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

It is a cyclic number.

It is not a de Polignac number, because 121409783 - 2⁶ = 121409719 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 (121409713) 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, 2348 + ... + 15758.

It is an arithmetic number, because the mean of its divisors is an integer number (16577232).

Almost surely, 2^121409783 is an apocalyptic number.

121409783 is a deficient number, since it is larger than the sum of its proper divisors (11208073).

121409783 is a wasteful number, since it uses less digits than its factorization.

121409783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14245.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 121409783 is about 11018.6107563522. The cubic root of 121409783 is about 495.1664685147.

It can be divided in two parts, 121 and 409783, that added together give a palindrome (409904).

The spelling of 121409783 in words is "one hundred twenty-one million, four hundred nine thousand, seven hundred eighty-three".