34721537 has 2 divisors, whose sum is σ = 34721538. Its totient is φ = 34721536.

The previous prime is 34721521. The next prime is 34721539. The reversal of 34721537 is 73512743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29170801 + 5550736 = 5401^2 + 2356^2 .

It is a cyclic number.

It is not a de Polignac number, because 34721537 - 2⁴ = 34721521 is a prime.

Together with 34721539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (34721539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17360768 + 17360769.

It is an arithmetic number, because the mean of its divisors is an integer number (17360769).

Almost surely, 2^34721537 is an apocalyptic number.

It is an amenable number.

34721537 is a deficient number, since it is larger than the sum of its proper divisors (1).

34721537 is an equidigital number, since it uses as much as digits as its factorization.

34721537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 32.

The square root of 34721537 is about 5892.4983665674. The cubic root of 34721537 is about 326.2368240398.

The spelling of 34721537 in words is "thirty-four million, seven hundred twenty-one thousand, five hundred thirty-seven".