39474721 has 8 divisors (see below), whose sum is σ = 46376064. Its totient is φ = 33125520.

The previous prime is 39474683. The next prime is 39474763. The reversal of 39474721 is 12747493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39474721 - 2⁷ = 39474593 is a prime.

It is a super-4 number, since 4×39474721⁴ (a number of 31 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39474121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137881 + ... + 138166.

It is an arithmetic number, because the mean of its divisors is an integer number (5797008).

Almost surely, 2^39474721 is an apocalyptic number.

It is an amenable number.

39474721 is a deficient number, since it is larger than the sum of its proper divisors (6901343).

39474721 is a wasteful number, since it uses less digits than its factorization.

39474721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276071.

The product of its digits is 42336, while the sum is 37.

The square root of 39474721 is about 6282.8911338650. The cubic root of 39474721 is about 340.4915640522.

It can be divided in two parts, 3947 and 4721, that added together give a palindrome (8668).

The spelling of 39474721 in words is "thirty-nine million, four hundred seventy-four thousand, seven hundred twenty-one".