83743917621 has 32 divisors (see below), whose sum is σ = 137464535040. Its totient is φ = 44160202944.

The previous prime is 83743917577. The next prime is 83743917641. The reversal of 83743917621 is 12671934738.

It is a happy number.

It is not a de Polignac number, because 83743917621 - 2⁹ = 83743917109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83743917641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 974046 + ... + 1056528.

It is an arithmetic number, because the mean of its divisors is an integer number (4295766720).

Almost surely, 2^83743917621 is an apocalyptic number.

It is an amenable number.

83743917621 is a deficient number, since it is larger than the sum of its proper divisors (53720617419).

83743917621 is a wasteful number, since it uses less digits than its factorization.

83743917621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86225.

The product of its digits is 1524096, while the sum is 51.

The spelling of 83743917621 in words is "eighty-three billion, seven hundred forty-three million, nine hundred seventeen thousand, six hundred twenty-one".