3857491129 has 8 divisors (see below), whose sum is σ = 3962573120. Its totient is φ = 3752452656.

The previous prime is 3857491123. The next prime is 3857491139. The reversal of 3857491129 is 9211947583.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3857491129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3857491123) 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, 257602 + ... + 272164.

It is an arithmetic number, because the mean of its divisors is an integer number (495321640).

Almost surely, 2^3857491129 is an apocalyptic number.

It is an amenable number.

3857491129 is a deficient number, since it is larger than the sum of its proper divisors (105081991).

3857491129 is a wasteful number, since it uses less digits than its factorization.

3857491129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21759.

The product of its digits is 544320, while the sum is 49.

The square root of 3857491129 is about 62108.7041323517. The cubic root of 3857491129 is about 1568.3210755330.

The spelling of 3857491129 in words is "three billion, eight hundred fifty-seven million, four hundred ninety-one thousand, one hundred twenty-nine".