37013521 has 2 divisors, whose sum is σ = 37013522. Its totient is φ = 37013520.

The previous prime is 37013513. The next prime is 37013527. The reversal of 37013521 is 12531073.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34939921 + 2073600 = 5911^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 37013521 - 2³ = 37013513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 37013492 and 37013501.

It is not a weakly prime, because it can be changed into another prime (37013527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18506760 + 18506761.

It is an arithmetic number, because the mean of its divisors is an integer number (18506761).

Almost surely, 2^37013521 is an apocalyptic number.

It is an amenable number.

37013521 is a deficient number, since it is larger than the sum of its proper divisors (1).

37013521 is an equidigital number, since it uses as much as digits as its factorization.

37013521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 37013521 is about 6083.8738481333. The cubic root of 37013521 is about 333.2627702858.

Adding to 37013521 its reverse (12531073), we get a palindrome (49544594).

The spelling of 37013521 in words is "thirty-seven million, thirteen thousand, five hundred twenty-one".