1868976461 has 4 divisors (see below), whose sum is σ = 2038883424. Its totient is φ = 1699069500.

The previous prime is 1868976451. The next prime is 1868976463. The reversal of 1868976461 is 1646798681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1868976461 - 2²⁶ = 1801867597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1868976397 and 1868976406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868976463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84953465 + ... + 84953486.

It is an arithmetic number, because the mean of its divisors is an integer number (509720856).

Almost surely, 2^1868976461 is an apocalyptic number.

1868976461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1868976461 is a deficient number, since it is larger than the sum of its proper divisors (169906963).

1868976461 is a wasteful number, since it uses less digits than its factorization.

1868976461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169906962.

The product of its digits is 3483648, while the sum is 56.

The square root of 1868976461 is about 43231.6604006832. The cubic root of 1868976461 is about 1231.7841473066.

The spelling of 1868976461 in words is "one billion, eight hundred sixty-eight million, nine hundred seventy-six thousand, four hundred sixty-one".