1874999561 has 2 divisors, whose sum is σ = 1874999562. Its totient is φ = 1874999560.

The previous prime is 1874999507. The next prime is 1874999569. The reversal of 1874999561 is 1659994781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1874890000 + 109561 = 43300^2 + 331^2 .

It is an emirp because it is prime and its reverse (1659994781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1874999561 - 2¹⁰ = 1874998537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1874999561.

It is not a weakly prime, because it can be changed into another prime (1874999569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 937499780 + 937499781.

It is an arithmetic number, because the mean of its divisors is an integer number (937499781).

Almost surely, 2^1874999561 is an apocalyptic number.

It is an amenable number.

1874999561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1874999561 is an equidigital number, since it uses as much as digits as its factorization.

1874999561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 59.

The square root of 1874999561 is about 43301.2651200863. The cubic root of 1874999561 is about 1233.1059409282.

The spelling of 1874999561 in words is "one billion, eight hundred seventy-four million, nine hundred ninety-nine thousand, five hundred sixty-one".