34401721 has 4 divisors (see below), whose sum is σ = 35897472. Its totient is φ = 32905972.

The previous prime is 34401713. The next prime is 34401733. The reversal of 34401721 is 12710443.

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 34401721 - 2³ = 34401713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 34401692 and 34401701.

It is not an unprimeable number, because it can be changed into a prime (34401781) 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, 747841 + ... + 747886.

It is an arithmetic number, because the mean of its divisors is an integer number (8974368).

Almost surely, 2^34401721 is an apocalyptic number.

It is an amenable number.

34401721 is a deficient number, since it is larger than the sum of its proper divisors (1495751).

34401721 is a wasteful number, since it uses less digits than its factorization.

34401721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495750.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 34401721 is about 5865.2980316434. The cubic root of 34401721 is about 325.2320898413.

The spelling of 34401721 in words is "thirty-four million, four hundred one thousand, seven hundred twenty-one".