37065781 has 2 divisors, whose sum is σ = 37065782. Its totient is φ = 37065780.

The previous prime is 37065757. The next prime is 37065803. The reversal of 37065781 is 18756073.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28451556 + 8614225 = 5334^2 + 2935^2 .

It is a cyclic number.

It is not a de Polignac number, because 37065781 - 2²¹ = 34968629 is a prime.

It is a super-2 number, since 2×37065781² = 2747744242279922, 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 37065781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37065701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18532890 + 18532891.

It is an arithmetic number, because the mean of its divisors is an integer number (18532891).

Almost surely, 2^37065781 is an apocalyptic number.

It is an amenable number.

37065781 is a deficient number, since it is larger than the sum of its proper divisors (1).

37065781 is an equidigital number, since it uses as much as digits as its factorization.

37065781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 37065781 is about 6088.1672940221. The cubic root of 37065781 is about 333.4195429240.

The spelling of 37065781 in words is "thirty-seven million, sixty-five thousand, seven hundred eighty-one".