3947950397 has 4 divisors (see below), whose sum is σ = 4155737280. Its totient is φ = 3740163516.

The previous prime is 3947950387. The next prime is 3947950399. The reversal of 3947950397 is 7930597493.

3947950397 is digitally balanced in base 3, 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3947950397 - 2⁴ = 3947950381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947950399) 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, 103893413 + ... + 103893450.

It is an arithmetic number, because the mean of its divisors is an integer number (1038934320).

Almost surely, 2^3947950397 is an apocalyptic number.

It is an amenable number.

3947950397 is a deficient number, since it is larger than the sum of its proper divisors (207786883).

3947950397 is a wasteful number, since it uses less digits than its factorization.

3947950397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207786882.

The product of its (nonzero) digits is 6429780, while the sum is 56.

The square root of 3947950397 is about 62832.7175681587. The cubic root of 3947950397 is about 1580.4856698762.

The spelling of 3947950397 in words is "three billion, nine hundred forty-seven million, nine hundred fifty thousand, three hundred ninety-seven".