187070889 has 4 divisors (see below), whose sum is σ = 249427856. Its totient is φ = 124713924.

The previous prime is 187070869. The next prime is 187070899. The reversal of 187070889 is 988070781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 187070889 - 2¹⁷ = 186939817 is a prime.

It is a super-2 number, since 2×187070889² = 69991035022500642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (187070869) 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, 31178479 + ... + 31178484.

It is an arithmetic number, because the mean of its divisors is an integer number (62356964).

Almost surely, 2^187070889 is an apocalyptic number.

It is an amenable number.

187070889 is a deficient number, since it is larger than the sum of its proper divisors (62356967).

187070889 is an equidigital number, since it uses as much as digits as its factorization.

187070889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62356966.

The product of its (nonzero) digits is 225792, while the sum is 48.

The square root of 187070889 is about 13677.3860441241. The cubic root of 187070889 is about 571.9201571198.

The spelling of 187070889 in words is "one hundred eighty-seven million, seventy thousand, eight hundred eighty-nine".