39857089 has 2 divisors, whose sum is σ = 39857090. Its totient is φ = 39857088.

The previous prime is 39857071. The next prime is 39857101. The reversal of 39857089 is 98075893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21298225 + 18558864 = 4615^2 + 4308^2 .

It is a cyclic number.

It is not a de Polignac number, because 39857089 - 2⁹ = 39856577 is a prime.

It is not a weakly prime, because it can be changed into another prime (39857039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19928544 + 19928545.

It is an arithmetic number, because the mean of its divisors is an integer number (19928545).

Almost surely, 2^39857089 is an apocalyptic number.

It is an amenable number.

39857089 is a deficient number, since it is larger than the sum of its proper divisors (1).

39857089 is an equidigital number, since it uses as much as digits as its factorization.

39857089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 39857089 is about 6313.2471043038. The cubic root of 39857089 is about 341.5874126968.

The spelling of 39857089 in words is "thirty-nine million, eight hundred fifty-seven thousand, eighty-nine".