93734999821 has 4 divisors (see below), whose sum is σ = 93766637952. Its totient is φ = 93703361692.

The previous prime is 93734999807. The next prime is 93734999833. The reversal of 93734999821 is 12899943739.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12899943739 = 21013 ⋅613903.

It is a cyclic number.

It is not a de Polignac number, because 93734999821 - 2⁷ = 93734999693 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 (93734999851) 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, 15814621 + ... + 15820546.

It is an arithmetic number, because the mean of its divisors is an integer number (23441659488).

Almost surely, 2^93734999821 is an apocalyptic number.

It is an amenable number.

93734999821 is a deficient number, since it is larger than the sum of its proper divisors (31638131).

93734999821 is a wasteful number, since it uses less digits than its factorization.

93734999821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31638130.

The product of its digits is 26453952, while the sum is 64.

The spelling of 93734999821 in words is "ninety-three billion, seven hundred thirty-four million, nine hundred ninety-nine thousand, eight hundred twenty-one".