393880121 has 4 divisors (see below), whose sum is σ = 394381392. Its totient is φ = 393378852.

The previous prime is 393880099. The next prime is 393880171. The reversal of 393880121 is 121088393.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 393880121 - 2⁶ = 393880057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393880171) 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, 249455 + ... + 251028.

It is an arithmetic number, because the mean of its divisors is an integer number (98595348).

Almost surely, 2^393880121 is an apocalyptic number.

It is an amenable number.

393880121 is a deficient number, since it is larger than the sum of its proper divisors (501271).

393880121 is an equidigital number, since it uses as much as digits as its factorization.

393880121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501270.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 393880121 is about 19846.4133031639. The cubic root of 393880121 is about 733.0293337526.

The spelling of 393880121 in words is "three hundred ninety-three million, eight hundred eighty thousand, one hundred twenty-one".