1364487861 has 16 divisors (see below), whose sum is σ = 2003263488. Its totient is φ = 819231600.

The previous prime is 1364487841. The next prime is 1364487871. The reversal of 1364487861 is 1687844631.

It is not a de Polignac number, because 1364487861 - 2⁵ = 1364487829 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1364487861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1364487821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189685 + ... + 196746.

It is an arithmetic number, because the mean of its divisors is an integer number (125203968).

Almost surely, 2^1364487861 is an apocalyptic number.

1364487861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1364487861 is a deficient number, since it is larger than the sum of its proper divisors (638775627).

1364487861 is a wasteful number, since it uses less digits than its factorization.

1364487861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386552.

The product of its digits is 774144, while the sum is 48.

The square root of 1364487861 is about 36938.9748233488. The cubic root of 1364487861 is about 1109.1490003595.

The spelling of 1364487861 in words is "one billion, three hundred sixty-four million, four hundred eighty-seven thousand, eight hundred sixty-one".