920388121 has 8 divisors (see below), whose sum is σ = 929948864. Its totient is φ = 910839600.

The previous prime is 920388113. The next prime is 920388187. The reversal of 920388121 is 121883029.

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 920388121 - 2³ = 920388113 is a prime.

It is a super-2 number, since 2×920388121² = 1694228586555821282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920388421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277171 + ... + 280471.

It is an arithmetic number, because the mean of its divisors is an integer number (116243608).

Almost surely, 2^920388121 is an apocalyptic number.

It is an amenable number.

920388121 is a deficient number, since it is larger than the sum of its proper divisors (9560743).

920388121 is a wasteful number, since it uses less digits than its factorization.

920388121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6111.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 920388121 is about 30337.8990867858. The cubic root of 920388121 is about 972.7255758846.

The spelling of 920388121 in words is "nine hundred twenty million, three hundred eighty-eight thousand, one hundred twenty-one".