39678473 has 4 divisors (see below), whose sum is σ = 41403648. Its totient is φ = 37953300.

The previous prime is 39678469. The next prime is 39678491. The reversal of 39678473 is 37487693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39678473 - 2² = 39678469 is a prime.

It is a super-2 number, since 2×39678473² = 3148762439223458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39678413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862553 + ... + 862598.

It is an arithmetic number, because the mean of its divisors is an integer number (10350912).

Almost surely, 2^39678473 is an apocalyptic number.

It is an amenable number.

39678473 is a deficient number, since it is larger than the sum of its proper divisors (1725175).

39678473 is a wasteful number, since it uses less digits than its factorization.

39678473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725174.

The product of its digits is 762048, while the sum is 47.

The square root of 39678473 is about 6299.0850922971. The cubic root of 39678473 is about 341.0763840204.

The spelling of 39678473 in words is "thirty-nine million, six hundred seventy-eight thousand, four hundred seventy-three".