3727742391 has 20 divisors (see below), whose sum is σ = 5659898904. Its totient is φ = 2444418000.

The previous prime is 3727742383. The next prime is 3727742399. The reversal of 3727742391 is 1932477273.

3727742391 is a `hidden beast` number, since 3 + 72 + 77 + 423 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (3727742383) and next prime (3727742399).

It is not a de Polignac number, because 3727742391 - 2³ = 3727742383 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3727742399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 372285 + ... + 382166.

Almost surely, 2^3727742391 is an apocalyptic number.

3727742391 is a deficient number, since it is larger than the sum of its proper divisors (1932156513).

3727742391 is an equidigital number, since it uses as much as digits as its factorization.

3727742391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754524 (or 754515 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The square root of 3727742391 is about 61055.2404876109. The cubic root of 3727742391 is about 1550.5363930571.

The spelling of 3727742391 in words is "three billion, seven hundred twenty-seven million, seven hundred forty-two thousand, three hundred ninety-one".