3667131921 has 8 divisors (see below), whose sum is σ = 4889869920. Its totient is φ = 2444574272.

The previous prime is 3667131911. The next prime is 3667131929. The reversal of 3667131921 is 1291317663.

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-3667131921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3667131921.

It is not an unprimeable number, because it can be changed into a prime (3667131929) 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, 13081 + ... + 86633.

It is an arithmetic number, because the mean of its divisors is an integer number (611233740).

Almost surely, 2^3667131921 is an apocalyptic number.

It is an amenable number.

3667131921 is a deficient number, since it is larger than the sum of its proper divisors (1222737999).

3667131921 is a wasteful number, since it uses less digits than its factorization.

3667131921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90175.

The product of its digits is 40824, while the sum is 39.

The square root of 3667131921 is about 60556.8486713105. The cubic root of 3667131921 is about 1542.0868880841.

The spelling of 3667131921 in words is "three billion, six hundred sixty-seven million, one hundred thirty-one thousand, nine hundred twenty-one".