2190895249 has 3 divisors (see below), whose sum is σ = 2190942057. Its totient is φ = 2190848442.

The previous prime is 2190895207. The next prime is 2190895261. The reversal of 2190895249 is 9425980912.

The square root of 2190895249 is 46807.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2190895249 - 2¹⁵ = 2190862481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2190895549) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 23404 + ... + 70210.

It is an arithmetic number, because the mean of its divisors is an integer number (730314019).

Almost surely, 2^2190895249 is an apocalyptic number.

2190895249 is the 46807-th square number.

2190895249 is the 23404-th centered octagonal number.

It is an amenable number.

2190895249 is a deficient number, since it is larger than the sum of its proper divisors (46808).

2190895249 is an frugal number, since it uses more digits than its factorization.

2190895249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93614 (or 46807 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

The cubic root of 2190895249 is about 1298.7947901144.

Multiplying 2190895249 by its sum of digits (49), we get a square (107353867201 = 327649²).

The spelling of 2190895249 in words is "two billion, one hundred ninety million, eight hundred ninety-five thousand, two hundred forty-nine".