1361872619 has 16 divisors (see below), whose sum is σ = 1449868800. Its totient is φ = 1276482240.

The previous prime is 1361872613. The next prime is 1361872627. The reversal of 1361872619 is 9162781631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361872619 is a prime.

It is a super-2 number, since 2×1361872619² = 3709394060763838322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1361872619.

It is not an unprimeable number, because it can be changed into a prime (1361872613) 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, 304439 + ... + 308879.

It is an arithmetic number, because the mean of its divisors is an integer number (90616800).

Almost surely, 2^1361872619 is an apocalyptic number.

1361872619 is a deficient number, since it is larger than the sum of its proper divisors (87996181).

1361872619 is a wasteful number, since it uses less digits than its factorization.

1361872619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4730.

The product of its digits is 108864, while the sum is 44.

The square root of 1361872619 is about 36903.5583514652. The cubic root of 1361872619 is about 1108.4399313355.

The spelling of 1361872619 in words is "one billion, three hundred sixty-one million, eight hundred seventy-two thousand, six hundred nineteen".