3667389421 has 8 divisors (see below), whose sum is σ = 3780116120. Its totient is φ = 3555379008.

The previous prime is 3667389419. The next prime is 3667389449. The reversal of 3667389421 is 1249837663.

It can be written as a sum of positive squares in 4 ways, for example, as 1921068900 + 1746320521 = 43830^2 + 41789^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3667389421 - 2¹ = 3667389419 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 (3667384421) 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, 168666 + ... + 189163.

It is an arithmetic number, because the mean of its divisors is an integer number (472514515).

Almost surely, 2^3667389421 is an apocalyptic number.

It is an amenable number.

3667389421 is a deficient number, since it is larger than the sum of its proper divisors (112726699).

3667389421 is a wasteful number, since it uses less digits than its factorization.

3667389421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358143.

The product of its digits is 1306368, while the sum is 49.

The square root of 3667389421 is about 60558.9747353768. The cubic root of 3667389421 is about 1542.1229815115.

The spelling of 3667389421 in words is "three billion, six hundred sixty-seven million, three hundred eighty-nine thousand, four hundred twenty-one".