187408061 has 4 divisors (see below), whose sum is σ = 191766432. Its totient is φ = 183049692.

The previous prime is 187408057. The next prime is 187408087. The reversal of 187408061 is 160804781.

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 a cyclic number.

It is not a de Polignac number, because 187408061 - 2² = 187408057 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 (187408031) 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, 2179121 + ... + 2179206.

It is an arithmetic number, because the mean of its divisors is an integer number (47941608).

Almost surely, 2^187408061 is an apocalyptic number.

It is an amenable number.

187408061 is a deficient number, since it is larger than the sum of its proper divisors (4358371).

187408061 is an equidigital number, since it uses as much as digits as its factorization.

187408061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358370.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 187408061 is about 13689.7063883781. The cubic root of 187408061 is about 572.2635558640.

The spelling of 187408061 in words is "one hundred eighty-seven million, four hundred eight thousand, sixty-one".