1084977721 has 3 divisors (see below), whose sum is σ = 1085010661. Its totient is φ = 1084944782.

The previous prime is 1084977703. The next prime is 1084977731. The reversal of 1084977721 is 1277794801.

The square root of 1084977721 is 32939.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1084977721 - 2⁹ = 1084977209 is a prime.

It is a super-3 number, since 3×1084977721³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1084977701) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16470 + ... + 49408.

Almost surely, 2^1084977721 is an apocalyptic number.

1084977721 is the 32939-th square number.

1084977721 is the 16470-th centered octagonal number.

It is an amenable number.

1084977721 is a deficient number, since it is larger than the sum of its proper divisors (32940).

1084977721 is an frugal number, since it uses more digits than its factorization.

1084977721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65878 (or 32939 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 46.

The cubic root of 1084977721 is about 1027.5594086768.

The spelling of 1084977721 in words is "one billion, eighty-four million, nine hundred seventy-seven thousand, seven hundred twenty-one".