39906245147 has 4 divisors (see below), whose sum is σ = 39906652896. Its totient is φ = 39905837400.

The previous prime is 39906245089. The next prime is 39906245191. The reversal of 39906245147 is 74154260993.

39906245147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74154260993 = 727 ⋅102000359.

It is a cyclic number.

It is not a de Polignac number, because 39906245147 - 2⁸ = 39906244891 is a prime.

It is a super-2 number, since 2×39906245147² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39906245095 and 39906245104.

It is not an unprimeable number, because it can be changed into a prime (39906245047) 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, 40853 + ... + 285449.

It is an arithmetic number, because the mean of its divisors is an integer number (9976663224).

Almost surely, 2^39906245147 is an apocalyptic number.

39906245147 is a deficient number, since it is larger than the sum of its proper divisors (407749).

39906245147 is a wasteful number, since it uses less digits than its factorization.

39906245147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407748.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 39906245147 in words is "thirty-nine billion, nine hundred six million, two hundred forty-five thousand, one hundred forty-seven".