39854389 has 2 divisors, whose sum is σ = 39854390. Its totient is φ = 39854388.

The previous prime is 39854369. The next prime is 39854401. The reversal of 39854389 is 98345893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38031889 + 1822500 = 6167^2 + 1350^2 .

It is an emirp because it is prime and its reverse (98345893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39854389 - 2¹³ = 39846197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39854369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19927194 + 19927195.

It is an arithmetic number, because the mean of its divisors is an integer number (19927195).

Almost surely, 2^39854389 is an apocalyptic number.

It is an amenable number.

39854389 is a deficient number, since it is larger than the sum of its proper divisors (1).

39854389 is an equidigital number, since it uses as much as digits as its factorization.

39854389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 39854389 is about 6313.0332646043. The cubic root of 39854389 is about 341.5796992481.

The spelling of 39854389 in words is "thirty-nine million, eight hundred fifty-four thousand, three hundred eighty-nine".