1077920321 has 4 divisors (see below), whose sum is σ = 1094008752. Its totient is φ = 1061831892.

The previous prime is 1077920317. The next prime is 1077920329. The reversal of 1077920321 is 1230297701.

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 1077920321 - 2² = 1077920317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1077920329) 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, 8044115 + ... + 8044248.

It is an arithmetic number, because the mean of its divisors is an integer number (273502188).

Almost surely, 2^1077920321 is an apocalyptic number.

It is an amenable number.

1077920321 is a deficient number, since it is larger than the sum of its proper divisors (16088431).

1077920321 is an equidigital number, since it uses as much as digits as its factorization.

1077920321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16088430.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 1077920321 is about 32831.6968949215. The cubic root of 1077920321 is about 1025.3265890888.

The spelling of 1077920321 in words is "one billion, seventy-seven million, nine hundred twenty thousand, three hundred twenty-one".