34991623 has 2 divisors, whose sum is σ = 34991624. Its totient is φ = 34991622.

The previous prime is 34991611. The next prime is 34991639. The reversal of 34991623 is 32619943.

34991623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34991623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34991323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17495811 + 17495812.

It is an arithmetic number, because the mean of its divisors is an integer number (17495812).

Almost surely, 2^34991623 is an apocalyptic number.

34991623 is a deficient number, since it is larger than the sum of its proper divisors (1).

34991623 is an equidigital number, since it uses as much as digits as its factorization.

34991623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 37.

The square root of 34991623 is about 5915.3717550125. The cubic root of 34991623 is about 327.0805320580.

The spelling of 34991623 in words is "thirty-four million, nine hundred ninety-one thousand, six hundred twenty-three".