1720474749 has 48 divisors (see below), whose sum is σ = 3118647168. Its totient is φ = 925281792.

The previous prime is 1720474697. The next prime is 1720474771. The reversal of 1720474749 is 9474740271.

1720474749 is a `hidden beast` number, since 172 + 0 + 4 + 7 + 474 + 9 = 666.

It is not a de Polignac number, because 1720474749 - 2⁸ = 1720474493 is a prime.

It is a super-2 number, since 2×1720474749² = 5920066723893226002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720474649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 832 + ... + 58665.

It is an arithmetic number, because the mean of its divisors is an integer number (64971816).

Almost surely, 2^1720474749 is an apocalyptic number.

It is an amenable number.

1720474749 is a deficient number, since it is larger than the sum of its proper divisors (1398172419).

1720474749 is an equidigital number, since it uses as much as digits as its factorization.

1720474749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59536 (or 59524 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 1720474749 is about 41478.6059191965. The cubic root of 1720474749 is about 1198.2555089380.

The spelling of 1720474749 in words is "one billion, seven hundred twenty million, four hundred seventy-four thousand, seven hundred forty-nine".