1087643545 has 4 divisors (see below), whose sum is σ = 1305172260. Its totient is φ = 870114832.

The previous prime is 1087643539. The next prime is 1087643549. The reversal of 1087643545 is 5453467801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5453467801 = 113 ⋅48260777.

It can be written as a sum of positive squares in 2 ways, for example, as 480661776 + 606981769 = 21924^2 + 24637^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087643545 - 2²⁷ = 953425817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1087643549) 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, 108764350 + ... + 108764359.

It is an arithmetic number, because the mean of its divisors is an integer number (326293065).

Almost surely, 2^1087643545 is an apocalyptic number.

It is an amenable number.

1087643545 is a deficient number, since it is larger than the sum of its proper divisors (217528715).

1087643545 is an equidigital number, since it uses as much as digits as its factorization.

1087643545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217528714.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 1087643545 is about 32979.4412475409. The cubic root of 1087643545 is about 1028.4003021589.

The spelling of 1087643545 in words is "one billion, eighty-seven million, six hundred forty-three thousand, five hundred forty-five".