34721047 has 4 divisors (see below), whose sum is σ = 34775856. Its totient is φ = 34666240.

The previous prime is 34721039. The next prime is 34721069. The reversal of 34721047 is 74012743.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 34721047 - 2³ = 34721039 is a prime.

It is a super-2 number, since 2×34721047² = 2411102209552418, 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 (34721347) 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, 26443 + ... + 27724.

It is an arithmetic number, because the mean of its divisors is an integer number (8693964).

Almost surely, 2^34721047 is an apocalyptic number.

34721047 is a deficient number, since it is larger than the sum of its proper divisors (54809).

34721047 is an equidigital number, since it uses as much as digits as its factorization.

34721047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54808.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 34721047 is about 5892.4567881318. The cubic root of 34721047 is about 326.2352893843.

The spelling of 34721047 in words is "thirty-four million, seven hundred twenty-one thousand, forty-seven".