9490372821 has 12 divisors (see below), whose sum is σ = 13709172672. Its totient is φ = 6326519976.

The previous prime is 9490372813. The next prime is 9490372823. The reversal of 9490372821 is 1282730949.

It is not a de Polignac number, because 9490372821 - 2³ = 9490372813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9490372823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227620 + ... + 266066.

It is an arithmetic number, because the mean of its divisors is an integer number (1142431056).

Almost surely, 2^9490372821 is an apocalyptic number.

It is an amenable number.

9490372821 is a deficient number, since it is larger than the sum of its proper divisors (4218799851).

9490372821 is a wasteful number, since it uses less digits than its factorization.

9490372821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65880 (or 65877 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 9490372821 is about 97418.5445436340. The cubic root of 9490372821 is about 2117.1961287134.

The spelling of 9490372821 in words is "nine billion, four hundred ninety million, three hundred seventy-two thousand, eight hundred twenty-one".