1077720647 has 4 divisors (see below), whose sum is σ = 1078403040. Its totient is φ = 1077038256.

The previous prime is 1077720617. The next prime is 1077720671. The reversal of 1077720647 is 7460277701.

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

It is a cyclic number.

It is not a de Polignac number, because 1077720647 - 2⁶ = 1077720583 is a prime.

It is a super-2 number, since 2×1077720647² = 2322963585940197218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1077720617) 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, 338822 + ... + 341987.

It is an arithmetic number, because the mean of its divisors is an integer number (269600760).

Almost surely, 2^1077720647 is an apocalyptic number.

1077720647 is a deficient number, since it is larger than the sum of its proper divisors (682393).

1077720647 is an equidigital number, since it uses as much as digits as its factorization.

1077720647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682392.

The product of its (nonzero) digits is 115248, while the sum is 41.

The square root of 1077720647 is about 32828.6558817141. The cubic root of 1077720647 is about 1025.2632746675.

The spelling of 1077720647 in words is "one billion, seventy-seven million, seven hundred twenty thousand, six hundred forty-seven".