34747421 has 2 divisors, whose sum is σ = 34747422. Its totient is φ = 34747420.

The previous prime is 34747399. The next prime is 34747441. The reversal of 34747421 is 12474743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34456900 + 290521 = 5870^2 + 539^2 .

It is an emirp because it is prime and its reverse (12474743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34747421 - 2¹⁸ = 34485277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34747441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17373710 + 17373711.

It is an arithmetic number, because the mean of its divisors is an integer number (17373711).

Almost surely, 2^34747421 is an apocalyptic number.

It is an amenable number.

34747421 is a deficient number, since it is larger than the sum of its proper divisors (1).

34747421 is an equidigital number, since it uses as much as digits as its factorization.

34747421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 32.

The square root of 34747421 is about 5894.6943092920. The cubic root of 34747421 is about 326.3178709175.

It can be divided in two parts, 3474742 and 1, that added together give a palindrome (3474743).

The spelling of 34747421 in words is "thirty-four million, seven hundred forty-seven thousand, four hundred twenty-one".