1721070549 has 12 divisors (see below), whose sum is σ = 2711990112. Its totient is φ = 1043073000.

The previous prime is 1721070539. The next prime is 1721070553. The reversal of 1721070549 is 9450701271.

It is a happy number.

1721070549 is a `hidden beast` number, since 1 + 7 + 2 + 107 + 0 + 549 = 666.

It is not a de Polignac number, because 1721070549 - 2⁵ = 1721070517 is a prime.

It is a super-2 number, since 2×1721070549² = 5924167669270322802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721070509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8692177 + ... + 8692374.

It is an arithmetic number, because the mean of its divisors is an integer number (225999176).

Almost surely, 2^1721070549 is an apocalyptic number.

It is an amenable number.

1721070549 is a deficient number, since it is larger than the sum of its proper divisors (990919563).

1721070549 is a wasteful number, since it uses less digits than its factorization.

1721070549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17384568 (or 17384565 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 1721070549 is about 41485.7873132474. The cubic root of 1721070549 is about 1198.3938115080.

The spelling of 1721070549 in words is "one billion, seven hundred twenty-one million, seventy thousand, five hundred forty-nine".