34640381 has 2 divisors, whose sum is σ = 34640382. Its totient is φ = 34640380.

The previous prime is 34640357. The next prime is 34640383. The reversal of 34640381 is 18304643.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 13388281 = 4610^2 + 3659^2 .

It is a cyclic number.

It is not a de Polignac number, because 34640381 - 2⁶ = 34640317 is a prime.

It is a super-2 number, since 2×34640381² = 2399911991650322, which contains 22 as substring.

Together with 34640383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34640383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17320190 + 17320191.

It is an arithmetic number, because the mean of its divisors is an integer number (17320191).

Almost surely, 2^34640381 is an apocalyptic number.

It is an amenable number.

34640381 is a deficient number, since it is larger than the sum of its proper divisors (1).

34640381 is an equidigital number, since it uses as much as digits as its factorization.

34640381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 34640381 is about 5885.6079550035. The cubic root of 34640381 is about 325.9824504083.

The spelling of 34640381 in words is "thirty-four million, six hundred forty thousand, three hundred eighty-one".