39009479 has 2 divisors, whose sum is σ = 39009480. Its totient is φ = 39009478.

The previous prime is 39009461. The next prime is 39009497. The reversal of 39009479 is 97490093.

Together with next prime (39009497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (39009461) and next prime (39009497).

It is an emirp because it is prime and its reverse (97490093) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39009479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39009779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19504739 + 19504740.

It is an arithmetic number, because the mean of its divisors is an integer number (19504740).

Almost surely, 2^39009479 is an apocalyptic number.

39009479 is a deficient number, since it is larger than the sum of its proper divisors (1).

39009479 is an equidigital number, since it uses as much as digits as its factorization.

39009479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 39009479 is about 6245.7568796744. The cubic root of 39009479 is about 339.1486166854.

The spelling of 39009479 in words is "thirty-nine million, nine thousand, four hundred seventy-nine".