1461543673 has 2 divisors, whose sum is σ = 1461543674. Its totient is φ = 1461543672.

The previous prime is 1461543659. The next prime is 1461543683. The reversal of 1461543673 is 3763451641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184254569 + 277289104 = 34413^2 + 16652^2 .

It is an emirp because it is prime and its reverse (3763451641) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1461543673 is a prime.

It is a super-2 number, since 2×1461543673² = 4272219816172661858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1461543683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730771836 + 730771837.

It is an arithmetic number, because the mean of its divisors is an integer number (730771837).

Almost surely, 2^1461543673 is an apocalyptic number.

It is an amenable number.

1461543673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1461543673 is an equidigital number, since it uses as much as digits as its factorization.

1461543673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 1461543673 is about 38230.1408969415. The cubic root of 1461543673 is about 1134.8468741006.

The spelling of 1461543673 in words is "one billion, four hundred sixty-one million, five hundred forty-three thousand, six hundred seventy-three".