2171690493 has 8 divisors (see below), whose sum is σ = 3309242688. Its totient is φ = 1240965984.

The previous prime is 2171690453. The next prime is 2171690503. The reversal of 2171690493 is 3940961712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2171690493 - 2⁸ = 2171690237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171690453) 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, 51706896 + ... + 51706937.

It is an arithmetic number, because the mean of its divisors is an integer number (413655336).

Almost surely, 2^2171690493 is an apocalyptic number.

It is an amenable number.

2171690493 is a deficient number, since it is larger than the sum of its proper divisors (1137552195).

2171690493 is a wasteful number, since it uses less digits than its factorization.

2171690493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103413843.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 2171690493 is about 46601.4001184514. The cubic root of 2171690493 is about 1294.9886937689.

The spelling of 2171690493 in words is "two billion, one hundred seventy-one million, six hundred ninety thousand, four hundred ninety-three".