920157321 has 8 divisors (see below), whose sum is σ = 1227909600. Its totient is φ = 612921632.

The previous prime is 920157299. The next prime is 920157341. The reversal of 920157321 is 123751029.

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 920157321 - 2⁶ = 920157257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (920157341) 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, 124971 + ... + 132128.

It is an arithmetic number, because the mean of its divisors is an integer number (153488700).

Almost surely, 2^920157321 is an apocalyptic number.

It is an amenable number.

920157321 is a deficient number, since it is larger than the sum of its proper divisors (307752279).

920157321 is a wasteful number, since it uses less digits than its factorization.

920157321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258295.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 920157321 is about 30334.0950252352. The cubic root of 920157321 is about 972.6442609747.

The spelling of 920157321 in words is "nine hundred twenty million, one hundred fifty-seven thousand, three hundred twenty-one".