39690037 has 2 divisors, whose sum is σ = 39690038. Its totient is φ = 39690036.

The previous prime is 39689983. The next prime is 39690089. The reversal of 39690037 is 73009693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39425841 + 264196 = 6279^2 + 514^2 .

It is an emirp because it is prime and its reverse (73009693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39690037 - 2¹⁵ = 39657269 is a prime.

It is a super-2 number, since 2×39690037² = 3150598074122738, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 39689978 and 39690005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39690097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19845018 + 19845019.

It is an arithmetic number, because the mean of its divisors is an integer number (19845019).

Almost surely, 2^39690037 is an apocalyptic number.

It is an amenable number.

39690037 is a deficient number, since it is larger than the sum of its proper divisors (1).

39690037 is an equidigital number, since it uses as much as digits as its factorization.

39690037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 37.

The square root of 39690037 is about 6300.0029365073. The cubic root of 39690037 is about 341.1095155390.

Subtracting from 39690037 its sum of digits (37), we obtain a square (39690000 = 6300²).

The spelling of 39690037 in words is "thirty-nine million, six hundred ninety thousand, thirty-seven".