921306401 has 4 divisors (see below), whose sum is σ = 946206612. Its totient is φ = 896406192.

The previous prime is 921306389. The next prime is 921306413. The reversal of 921306401 is 104603129.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (921306389) and next prime (921306413).

It can be written as a sum of positive squares in 2 ways, for example, as 786746401 + 134560000 = 28049^2 + 11600^2 .

It is a cyclic number.

It is not a de Polignac number, because 921306401 - 2¹⁰ = 921305377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921306431) 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 3 ways as a sum of consecutive naturals, for example, 12450050 + ... + 12450123.

It is an arithmetic number, because the mean of its divisors is an integer number (236551653).

Almost surely, 2^921306401 is an apocalyptic number.

It is an amenable number.

921306401 is a deficient number, since it is larger than the sum of its proper divisors (24900211).

921306401 is a wasteful number, since it uses less digits than its factorization.

921306401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24900210.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 921306401 is about 30353.0295193083. The cubic root of 921306401 is about 973.0489675506.

The spelling of 921306401 in words is "nine hundred twenty-one million, three hundred six thousand, four hundred one".