1081897487 has 8 divisors (see below), whose sum is σ = 1242370560. Its totient is φ = 931777560.

The previous prime is 1081897457. The next prime is 1081897513. The reversal of 1081897487 is 7847981801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1081897487 - 2⁶ = 1081897423 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 (1081897417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2588063 + ... + 2588480.

It is an arithmetic number, because the mean of its divisors is an integer number (155296320).

Almost surely, 2^1081897487 is an apocalyptic number.

1081897487 is a deficient number, since it is larger than the sum of its proper divisors (160473073).

1081897487 is a wasteful number, since it uses less digits than its factorization.

1081897487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176573.

The product of its (nonzero) digits is 903168, while the sum is 53.

The square root of 1081897487 is about 32892.2101264114. The cubic root of 1081897487 is about 1026.5860788888.

The spelling of 1081897487 in words is "one billion, eighty-one million, eight hundred ninety-seven thousand, four hundred eighty-seven".