1361471887 has 4 divisors (see below), whose sum is σ = 1371409776. Its totient is φ = 1351534000.

The previous prime is 1361471879. The next prime is 1361471899. The reversal of 1361471887 is 7881741631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361471887 - 2³ = 1361471879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361471807) 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, 4968739 + ... + 4969012.

It is an arithmetic number, because the mean of its divisors is an integer number (342852444).

Almost surely, 2^1361471887 is an apocalyptic number.

1361471887 is a deficient number, since it is larger than the sum of its proper divisors (9937889).

1361471887 is an equidigital number, since it uses as much as digits as its factorization.

1361471887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9937888.

The product of its digits is 225792, while the sum is 46.

The square root of 1361471887 is about 36898.1285026761. The cubic root of 1361471887 is about 1108.3312009205.

The spelling of 1361471887 in words is "one billion, three hundred sixty-one million, four hundred seventy-one thousand, eight hundred eighty-seven".