34129781 has 8 divisors (see below), whose sum is σ = 40350720. Its totient is φ = 28245168.

The previous prime is 34129747. The next prime is 34129787. The reversal of 34129781 is 18792143.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 34129781 - 2⁶ = 34129717 is a prime.

It is a super-2 number, since 2×34129781² = 2329683902215922, 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 (34129787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83861 + ... + 84266.

It is an arithmetic number, because the mean of its divisors is an integer number (5043840).

Almost surely, 2^34129781 is an apocalyptic number.

It is an amenable number.

34129781 is a deficient number, since it is larger than the sum of its proper divisors (6220939).

34129781 is a wasteful number, since it uses less digits than its factorization.

34129781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168163.

The product of its digits is 12096, while the sum is 35.

The square root of 34129781 is about 5842.0699242649. The cubic root of 34129781 is about 324.3728529105.

The spelling of 34129781 in words is "thirty-four million, one hundred twenty-nine thousand, seven hundred eighty-one".