1772974721 has 16 divisors (see below), whose sum is σ = 2169062400. Its totient is φ = 1415300688.

The previous prime is 1772974717. The next prime is 1772974729. The reversal of 1772974721 is 1274792771.

It is a cyclic number.

It is not a de Polignac number, because 1772974721 - 2² = 1772974717 is a prime.

It is a super-2 number, since 2×1772974721² = 6286878722610055682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1772974729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105125 + ... + 120818.

It is an arithmetic number, because the mean of its divisors is an integer number (135566400).

Almost surely, 2^1772974721 is an apocalyptic number.

It is an amenable number.

1772974721 is a deficient number, since it is larger than the sum of its proper divisors (396087679).

1772974721 is a wasteful number, since it uses less digits than its factorization.

1772974721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226028.

The product of its digits is 345744, while the sum is 47.

The square root of 1772974721 is about 42106.7063660885. The cubic root of 1772974721 is about 1210.3217779097.

The spelling of 1772974721 in words is "one billion, seven hundred seventy-two million, nine hundred seventy-four thousand, seven hundred twenty-one".