1887089697 has 16 divisors (see below), whose sum is σ = 2796468480. Its totient is φ = 1257708816.

The previous prime is 1887089693. The next prime is 1887089713. The reversal of 1887089697 is 7969807881.

It is not a de Polignac number, because 1887089697 - 2² = 1887089693 is a prime.

It is a super-2 number, since 2×1887089697² = 7122215049047103618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1887089693) 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, 120408 + ... + 135174.

It is an arithmetic number, because the mean of its divisors is an integer number (174779280).

Almost surely, 2^1887089697 is an apocalyptic number.

It is an amenable number.

1887089697 is a deficient number, since it is larger than the sum of its proper divisors (909378783).

1887089697 is a wasteful number, since it uses less digits than its factorization.

1887089697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19509 (or 19503 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 63.

The square root of 1887089697 is about 43440.6456789031. The cubic root of 1887089697 is about 1235.7506507557.

The spelling of 1887089697 in words is "one billion, eight hundred eighty-seven million, eighty-nine thousand, six hundred ninety-seven".