3947374091 has 2 divisors, whose sum is σ = 3947374092. Its totient is φ = 3947374090.

The previous prime is 3947374061. The next prime is 3947374133. The reversal of 3947374091 is 1904737493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3947374091 - 2⁶ = 3947374027 is a prime.

It is a super-3 number, since 3×3947374091³ (a number of 30 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (3947374021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973687045 + 1973687046.

It is an arithmetic number, because the mean of its divisors is an integer number (1973687046).

Almost surely, 2^3947374091 is an apocalyptic number.

3947374091 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947374091 is an equidigital number, since it uses as much as digits as its factorization.

3947374091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 47.

The square root of 3947374091 is about 62828.1313664508. The cubic root of 3947374091 is about 1580.4087618094.

The spelling of 3947374091 in words is "three billion, nine hundred forty-seven million, three hundred seventy-four thousand, ninety-one".