3490001721 has 12 divisors (see below), whose sum is σ = 5227821872. Its totient is φ = 2326667652.

The previous prime is 3490001699. The next prime is 3490001743. The reversal of 3490001721 is 1271000943.

3490001721 is a `hidden beast` number, since 3 + 490 + 0 + 0 + 172 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (3490001699) and next prime (3490001743).

It is not a de Polignac number, because 3490001721 - 2¹¹ = 3489999673 is a prime.

It is a super-2 number, since 2×3490001721² = 24360224025165923682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3490001771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7180831 + ... + 7181316.

Almost surely, 2^3490001721 is an apocalyptic number.

It is an amenable number.

3490001721 is a deficient number, since it is larger than the sum of its proper divisors (1737820151).

3490001721 is an equidigital number, since it uses as much as digits as its factorization.

3490001721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14362162 (or 14362150 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 3490001721 is about 59076.2365168940. The cubic root of 3490001721 is about 1516.8473611922.

The spelling of 3490001721 in words is "three billion, four hundred ninety million, one thousand, seven hundred twenty-one".