34536781 has 2 divisors, whose sum is σ = 34536782. Its totient is φ = 34536780.

The previous prime is 34536763. The next prime is 34536787. The reversal of 34536781 is 18763543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17388900 + 17147881 = 4170^2 + 4141^2 .

It is an emirp because it is prime and its reverse (18763543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34536781 - 2²¹ = 32439629 is a prime.

It is a super-2 number, since 2×34536781² = 2385578483683922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 34536781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34536787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17268390 + 17268391.

It is an arithmetic number, because the mean of its divisors is an integer number (17268391).

Almost surely, 2^34536781 is an apocalyptic number.

It is an amenable number.

34536781 is a deficient number, since it is larger than the sum of its proper divisors (1).

34536781 is an equidigital number, since it uses as much as digits as its factorization.

34536781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 34536781 is about 5876.8002348217. The cubic root of 34536781 is about 325.6571508172.

The spelling of 34536781 in words is "thirty-four million, five hundred thirty-six thousand, seven hundred eighty-one".