39820057 has 2 divisors, whose sum is σ = 39820058. Its totient is φ = 39820056.

The previous prime is 39820051. The next prime is 39820063. The reversal of 39820057 is 75002893.

It is a balanced prime because it is at equal distance from previous prime (39820051) and next prime (39820063).

It can be written as a sum of positive squares in only one way, i.e., 34386496 + 5433561 = 5864^2 + 2331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39820057 is a prime.

It is not a weakly prime, because it can be changed into another prime (39820051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19910028 + 19910029.

It is an arithmetic number, because the mean of its divisors is an integer number (19910029).

Almost surely, 2^39820057 is an apocalyptic number.

It is an amenable number.

39820057 is a deficient number, since it is larger than the sum of its proper divisors (1).

39820057 is an equidigital number, since it uses as much as digits as its factorization.

39820057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 39820057 is about 6310.3135421309. The cubic root of 39820057 is about 341.4815880695.

The spelling of 39820057 in words is "thirty-nine million, eight hundred twenty thousand, fifty-seven".