3440577421 has 4 divisors (see below), whose sum is σ = 3446624700. Its totient is φ = 3434530144.

The previous prime is 3440577409. The next prime is 3440577461. The reversal of 3440577421 is 1247750443.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1247750443 = 719 ⋅1735397.

It can be written as a sum of positive squares in 2 ways, for example, as 1841697225 + 1598880196 = 42915^2 + 39986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3440577421 is a prime.

It is a super-2 number, since 2×3440577421² = 23675145979790022482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3440577401) 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, 3022786 + ... + 3023923.

It is an arithmetic number, because the mean of its divisors is an integer number (861656175).

Almost surely, 2^3440577421 is an apocalyptic number.

It is an amenable number.

3440577421 is a deficient number, since it is larger than the sum of its proper divisors (6047279).

3440577421 is an equidigital number, since it uses as much as digits as its factorization.

3440577421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6047278.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 3440577421 is about 58656.4354610813. The cubic root of 3440577421 is about 1509.6529209743.

The spelling of 3440577421 in words is "three billion, four hundred forty million, five hundred seventy-seven thousand, four hundred twenty-one".