3947172373 has 4 divisors (see below), whose sum is σ = 3960029920. Its totient is φ = 3934314828.

The previous prime is 3947172343. The next prime is 3947172409. The reversal of 3947172373 is 3732717493.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3732717493 = 6361 ⋅586813.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3947172373 is a prime.

It is a super-2 number, since 2×3947172373² = 31160339484348902258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947172343) 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, 6428313 + ... + 6428926.

It is an arithmetic number, because the mean of its divisors is an integer number (990007480).

Almost surely, 2^3947172373 is an apocalyptic number.

It is an amenable number.

3947172373 is a deficient number, since it is larger than the sum of its proper divisors (12857547).

3947172373 is a wasteful number, since it uses less digits than its factorization.

3947172373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12857546.

The product of its digits is 666792, while the sum is 46.

The square root of 3947172373 is about 62826.5260300138. The cubic root of 3947172373 is about 1580.3818407628.

The spelling of 3947172373 in words is "three billion, nine hundred forty-seven million, one hundred seventy-two thousand, three hundred seventy-three".