39909137 has 2 divisors, whose sum is σ = 39909138. Its totient is φ = 39909136.

The previous prime is 39909131. The next prime is 39909143. The reversal of 39909137 is 73190993.

It is a balanced prime because it is at equal distance from previous prime (39909131) and next prime (39909143).

It can be written as a sum of positive squares in only one way, i.e., 39325441 + 583696 = 6271^2 + 764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39909137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39909094 and 39909103.

It is not a weakly prime, because it can be changed into another prime (39909131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19954568 + 19954569.

It is an arithmetic number, because the mean of its divisors is an integer number (19954569).

Almost surely, 2^39909137 is an apocalyptic number.

It is an amenable number.

39909137 is a deficient number, since it is larger than the sum of its proper divisors (1).

39909137 is an equidigital number, since it uses as much as digits as its factorization.

39909137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 39909137 is about 6317.3678854409. The cubic root of 39909137 is about 341.7360371009.

The spelling of 39909137 in words is "thirty-nine million, nine hundred nine thousand, one hundred thirty-seven".