34978621 has 4 divisors (see below), whose sum is σ = 35305632. Its totient is φ = 34651612.

The previous prime is 34978597. The next prime is 34978663. The reversal of 34978621 is 12687943.

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 34978621 - 2⁵ = 34978589 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 (34978121) 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, 163345 + ... + 163558.

It is an arithmetic number, because the mean of its divisors is an integer number (8826408).

Almost surely, 2^34978621 is an apocalyptic number.

It is an amenable number.

34978621 is a deficient number, since it is larger than the sum of its proper divisors (327011).

34978621 is a wasteful number, since it uses less digits than its factorization.

34978621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327010.

The product of its digits is 72576, while the sum is 40.

The square root of 34978621 is about 5914.2726518144. The cubic root of 34978621 is about 327.0400154281.

The spelling of 34978621 in words is "thirty-four million, nine hundred seventy-eight thousand, six hundred twenty-one".