921404936549 has 8 divisors (see below), whose sum is σ = 922877284032. Its totient is φ = 919933650720.

The previous prime is 921404936539. The next prime is 921404936561. The reversal of 921404936549 is 945639404129.

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-921404936549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 921404936494 and 921404936503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921404936519) 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, 1480922 + ... + 2008964.

It is an arithmetic number, because the mean of its divisors is an integer number (115359660504).

Almost surely, 2^921404936549 is an apocalyptic number.

It is an amenable number.

921404936549 is a deficient number, since it is larger than the sum of its proper divisors (1472347483).

921404936549 is a wasteful number, since it uses less digits than its factorization.

921404936549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530827.

The product of its (nonzero) digits is 8398080, while the sum is 56.

The spelling of 921404936549 in words is "nine hundred twenty-one billion, four hundred four million, nine hundred thirty-six thousand, five hundred forty-nine".