11890513487 has 4 divisors (see below), whose sum is σ = 11897081016. Its totient is φ = 11883945960.

The previous prime is 11890513477. The next prime is 11890513489. The reversal of 11890513487 is 78431509811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78431509811 = 17599 ⋅4456589.

It is a cyclic number.

It is not a de Polignac number, because 11890513487 - 2⁸ = 11890513231 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 (11890513489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3281048 + ... + 3284669.

It is an arithmetic number, because the mean of its divisors is an integer number (2974270254).

Almost surely, 2^11890513487 is an apocalyptic number.

11890513487 is a deficient number, since it is larger than the sum of its proper divisors (6567529).

11890513487 is an equidigital number, since it uses as much as digits as its factorization.

11890513487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6567528.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 11890513487 in words is "eleven billion, eight hundred ninety million, five hundred thirteen thousand, four hundred eighty-seven".