3671972947 has 4 divisors (see below), whose sum is σ = 3713231160. Its totient is φ = 3630714736.

The previous prime is 3671972903. The next prime is 3671972963. The reversal of 3671972947 is 7492791763.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3671972947 - 2⁷ = 3671972819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3671976947) 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, 20628973 + ... + 20629150.

It is an arithmetic number, because the mean of its divisors is an integer number (928307790).

Almost surely, 2^3671972947 is an apocalyptic number.

3671972947 is a deficient number, since it is larger than the sum of its proper divisors (41258213).

3671972947 is an equidigital number, since it uses as much as digits as its factorization.

3671972947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41258212.

The product of its digits is 4000752, while the sum is 55.

The square root of 3671972947 is about 60596.8064092490. The cubic root of 3671972947 is about 1542.7651656666.

The spelling of 3671972947 in words is "three billion, six hundred seventy-one million, nine hundred seventy-two thousand, nine hundred forty-seven".