1087944551 has 4 divisors (see below), whose sum is σ = 1135246512. Its totient is φ = 1040642592.

The previous prime is 1087944497. The next prime is 1087944569. The reversal of 1087944551 is 1554497801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1554497801 = 521 ⋅2983681.

It is a cyclic number.

It is not a de Polignac number, because 1087944551 - 2²² = 1083750247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087944751) 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, 23650946 + ... + 23650991.

It is an arithmetic number, because the mean of its divisors is an integer number (283811628).

Almost surely, 2^1087944551 is an apocalyptic number.

1087944551 is a deficient number, since it is larger than the sum of its proper divisors (47301961).

1087944551 is an equidigital number, since it uses as much as digits as its factorization.

1087944551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47301960.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 1087944551 is about 32984.0044718648. The cubic root of 1087944551 is about 1028.4951635409.

The spelling of 1087944551 in words is "one billion, eighty-seven million, nine hundred forty-four thousand, five hundred fifty-one".