3901429621 has 4 divisors (see below), whose sum is σ = 3929497600. Its totient is φ = 3873361644.

The previous prime is 3901429583. The next prime is 3901429667. The reversal of 3901429621 is 1269241093.

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: 1269241093 = 6967 ⋅182179.

It is a cyclic number.

It is not a de Polignac number, because 3901429621 - 2²⁵ = 3867875189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3901429321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14033781 + ... + 14034058.

It is an arithmetic number, because the mean of its divisors is an integer number (982374400).

Almost surely, 2^3901429621 is an apocalyptic number.

It is an amenable number.

3901429621 is a deficient number, since it is larger than the sum of its proper divisors (28067979).

3901429621 is a wasteful number, since it uses less digits than its factorization.

3901429621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28067978.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 3901429621 is about 62461.4250637944. The cubic root of 3901429621 is about 1574.2532273693.

It can be divided in two parts, 39014 and 29621, that added together give a triangular number (68635 = T₃₇₀).

The spelling of 3901429621 in words is "three billion, nine hundred one million, four hundred twenty-nine thousand, six hundred twenty-one".