921607427 has 8 divisors (see below), whose sum is σ = 998824176. Its totient is φ = 845294112.

The previous prime is 921607411. The next prime is 921607439. The reversal of 921607427 is 724706129.

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

It is not a de Polignac number, because 921607427 - 2⁴ = 921607411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921607627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223733 + ... + 227814.

It is an arithmetic number, because the mean of its divisors is an integer number (124853022).

Almost surely, 2^921607427 is an apocalyptic number.

921607427 is a deficient number, since it is larger than the sum of its proper divisors (77216749).

921607427 is a wasteful number, since it uses less digits than its factorization.

921607427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451717.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 921607427 is about 30357.9878615168. The cubic root of 921607427 is about 973.1549334349.

The spelling of 921607427 in words is "nine hundred twenty-one million, six hundred seven thousand, four hundred twenty-seven".