34721893 has 4 divisors (see below), whose sum is σ = 34871148. Its totient is φ = 34572640.

The previous prime is 34721867. The next prime is 34721909. The reversal of 34721893 is 39812743.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39812743 = 1523 ⋅26141.

It can be written as a sum of positive squares in 2 ways, for example, as 24780484 + 9941409 = 4978^2 + 3153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34721893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34721833) 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, 74278 + ... + 74743.

It is an arithmetic number, because the mean of its divisors is an integer number (8717787).

Almost surely, 2^34721893 is an apocalyptic number.

It is an amenable number.

34721893 is a deficient number, since it is larger than the sum of its proper divisors (149255).

34721893 is a wasteful number, since it uses less digits than its factorization.

34721893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149254.

The product of its digits is 36288, while the sum is 37.

The square root of 34721893 is about 5892.5285743898. The cubic root of 34721893 is about 326.2379390050.

The spelling of 34721893 in words is "thirty-four million, seven hundred twenty-one thousand, eight hundred ninety-three".