34879781 has 8 divisors (see below), whose sum is σ = 35750784. Its totient is φ = 34014240.

The previous prime is 34879769. The next prime is 34879813. The reversal of 34879781 is 18797843.

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

It is a cyclic number.

It is not a de Polignac number, because 34879781 - 2¹⁰ = 34878757 is a prime.

It is a super-2 number, since 2×34879781² = 2433198245215922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34879081) 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, 13526 + ... + 15896.

It is an arithmetic number, because the mean of its divisors is an integer number (4468848).

Almost surely, 2^34879781 is an apocalyptic number.

It is an amenable number.

34879781 is a deficient number, since it is larger than the sum of its proper divisors (871003).

34879781 is a wasteful number, since it uses less digits than its factorization.

34879781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731.

The product of its digits is 338688, while the sum is 47.

The square root of 34879781 is about 5905.9106833747. The cubic root of 34879781 is about 326.7316829958.

It can be divided in two parts, 3 and 4879781, that added together give a palindrome (4879784).

The spelling of 34879781 in words is "thirty-four million, eight hundred seventy-nine thousand, seven hundred eighty-one".