3458538721 has 4 divisors (see below), whose sum is σ = 3772951344. Its totient is φ = 3144126100.

The previous prime is 3458538661. The next prime is 3458538731. The reversal of 3458538721 is 1278358543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3458538721 - 2²³ = 3450150113 is a prime.

It is a super-2 number, since 2×3458538721² = 23922980169312631682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3458538731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157206295 + ... + 157206316.

It is an arithmetic number, because the mean of its divisors is an integer number (943237836).

Almost surely, 2^3458538721 is an apocalyptic number.

It is an amenable number.

3458538721 is a deficient number, since it is larger than the sum of its proper divisors (314412623).

3458538721 is a wasteful number, since it uses less digits than its factorization.

3458538721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314412622.

The product of its digits is 806400, while the sum is 46.

The square root of 3458538721 is about 58809.3421235096. The cubic root of 3458538721 is about 1512.2753762092.

The spelling of 3458538721 in words is "three billion, four hundred fifty-eight million, five hundred thirty-eight thousand, seven hundred twenty-one".