1662894131 has 2 divisors, whose sum is σ = 1662894132. Its totient is φ = 1662894130.

The previous prime is 1662894073. The next prime is 1662894143. The reversal of 1662894131 is 1314982661.

It is a strong prime.

It is an emirp because it is prime and its reverse (1314982661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1662894131 - 2¹⁴ = 1662877747 is a prime.

It is a super-2 number, since 2×1662894131² = 5530433781828490322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1662894631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831447065 + 831447066.

It is an arithmetic number, because the mean of its divisors is an integer number (831447066).

Almost surely, 2^1662894131 is an apocalyptic number.

1662894131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662894131 is an equidigital number, since it uses as much as digits as its factorization.

1662894131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 1662894131 is about 40778.5989337545. The cubic root of 1662894131 is about 1184.7358585658.

The spelling of 1662894131 in words is "one billion, six hundred sixty-two million, eight hundred ninety-four thousand, one hundred thirty-one".