3947907243 has 32 divisors (see below), whose sum is σ = 6282095616. Its totient is φ = 2156254848.

The previous prime is 3947907193. The next prime is 3947907253. The reversal of 3947907243 is 3427097493.

It is not a de Polignac number, because 3947907243 - 2¹⁷ = 3947776171 is a prime.

It is a super-2 number, since 2×3947907243² = 31171943198663722098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3947907192 and 3947907201.

It is not an unprimeable number, because it can be changed into a prime (3947907253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 962505 + ... + 966597.

It is an arithmetic number, because the mean of its divisors is an integer number (196315488).

Almost surely, 2^3947907243 is an apocalyptic number.

3947907243 is a deficient number, since it is larger than the sum of its proper divisors (2334188373).

3947907243 is a wasteful number, since it uses less digits than its factorization.

3947907243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123.

The product of its (nonzero) digits is 1143072, while the sum is 48.

The square root of 3947907243 is about 62832.3741633244. The cubic root of 3947907243 is about 1580.4799112318.

The spelling of 3947907243 in words is "three billion, nine hundred forty-seven million, nine hundred seven thousand, two hundred forty-three".