187148901 has 4 divisors (see below), whose sum is σ = 249531872. Its totient is φ = 124765932.

The previous prime is 187148893. The next prime is 187148963. The reversal of 187148901 is 109841781.

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 187148901 - 2³ = 187148893 is a prime.

It is a super-2 number, since 2×187148901² = 70049422291015602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 187148901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187148201) 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, 31191481 + ... + 31191486.

It is an arithmetic number, because the mean of its divisors is an integer number (62382968).

Almost surely, 2^187148901 is an apocalyptic number.

It is an amenable number.

187148901 is a deficient number, since it is larger than the sum of its proper divisors (62382971).

187148901 is an equidigital number, since it uses as much as digits as its factorization.

187148901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62382970.

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 187148901 is about 13680.2376075856. The cubic root of 187148901 is about 571.9996464780. Note that the first 3 decimals are identical.

The spelling of 187148901 in words is "one hundred eighty-seven million, one hundred forty-eight thousand, nine hundred one".