3971267507 has 4 divisors (see below), whose sum is σ = 4204871496. Its totient is φ = 3737663520.

The previous prime is 3971267449. The next prime is 3971267513. The reversal of 3971267507 is 7057621793.

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

It is not a de Polignac number, because 3971267507 - 2¹⁰ = 3971266483 is a prime.

It is a super-2 number, since 2×3971267507² = 31541931224307990098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3971267527) 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, 116801969 + ... + 116802002.

It is an arithmetic number, because the mean of its divisors is an integer number (1051217874).

Almost surely, 2^3971267507 is an apocalyptic number.

3971267507 is a deficient number, since it is larger than the sum of its proper divisors (233603989).

3971267507 is a wasteful number, since it uses less digits than its factorization.

3971267507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233603988.

The product of its (nonzero) digits is 555660, while the sum is 47.

The square root of 3971267507 is about 63017.9935177248. The cubic root of 3971267507 is about 1583.5910823924.

The spelling of 3971267507 in words is "three billion, nine hundred seventy-one million, two hundred sixty-seven thousand, five hundred seven".