3721135906 has 16 divisors (see below), whose sum is σ = 5600389248. Its totient is φ = 1854349200.

The previous prime is 3721135889. The next prime is 3721135907. The reversal of 3721135906 is 6095311273.

It is not an unprimeable number, because it can be changed into a prime (3721135907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251001 + ... + 1253971.

It is an arithmetic number, because the mean of its divisors is an integer number (350024328).

Almost surely, 2^3721135906 is an apocalyptic number.

3721135906 is a deficient number, since it is larger than the sum of its proper divisors (1879253342).

3721135906 is a wasteful number, since it uses less digits than its factorization.

3721135906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4857.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 3721135906 is about 61001.1139734349. The cubic root of 3721135906 is about 1549.6198729304.

It can be divided in two parts, 372 and 1135906, that added together give a triangular number (1136278 = T₁₅₀₇).

The spelling of 3721135906 in words is "three billion, seven hundred twenty-one million, one hundred thirty-five thousand, nine hundred six".