3867402621 has 4 divisors (see below), whose sum is σ = 5156536832. Its totient is φ = 2578268412.

The previous prime is 3867402611. The next prime is 3867402653. The reversal of 3867402621 is 1262047683.

It is a happy number.

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.

It is not a de Polignac number, because 3867402621 - 2⁹ = 3867402109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3867402621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3867402611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644567101 + ... + 644567106.

It is an arithmetic number, because the mean of its divisors is an integer number (1289134208).

Almost surely, 2^3867402621 is an apocalyptic number.

It is an amenable number.

3867402621 is a deficient number, since it is larger than the sum of its proper divisors (1289134211).

3867402621 is a wasteful number, since it uses less digits than its factorization.

3867402621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289134210.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 3867402621 is about 62188.4444330295. Note that the first 4 decimals coincide. The cubic root of 3867402621 is about 1569.6631488229.

The spelling of 3867402621 in words is "three billion, eight hundred sixty-seven million, four hundred two thousand, six hundred twenty-one".