1946216693 has 4 divisors (see below), whose sum is σ = 1959278700. Its totient is φ = 1933154688.

The previous prime is 1946216689. The next prime is 1946216711. The reversal of 1946216693 is 3966126491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3966126491 = 89 ⋅44563219.

It can be written as a sum of positive squares in 2 ways, for example, as 425060689 + 1521156004 = 20617^2 + 39002^2 .

It is a cyclic number.

It is not a de Polignac number, because 1946216693 - 2² = 1946216689 is a prime.

It is a super-2 number, since 2×1946216693² = 7575518832223712498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1946216653) 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, 6530780 + ... + 6531077.

It is an arithmetic number, because the mean of its divisors is an integer number (489819675).

Almost surely, 2^1946216693 is an apocalyptic number.

It is an amenable number.

1946216693 is a deficient number, since it is larger than the sum of its proper divisors (13062007).

1946216693 is a wasteful number, since it uses less digits than its factorization.

1946216693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13062006.

The product of its digits is 419904, while the sum is 47.

The square root of 1946216693 is about 44115.9460172850. The cubic root of 1946216693 is about 1248.5244868140.

The spelling of 1946216693 in words is "one billion, nine hundred forty-six million, two hundred sixteen thousand, six hundred ninety-three".