61187487 has 8 divisors (see below), whose sum is σ = 81633840. Its totient is φ = 40766400.

The previous prime is 61187479. The next prime is 61187501. The reversal of 61187487 is 78478116.

It is a happy number.

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

It is not a de Polignac number, because 61187487 - 2³ = 61187479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61187417) 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, 339 + ... + 11067.

It is an arithmetic number, because the mean of its divisors is an integer number (10204230).

Almost surely, 2^61187487 is an apocalyptic number.

61187487 is a deficient number, since it is larger than the sum of its proper divisors (20446353).

61187487 is a wasteful number, since it uses less digits than its factorization.

61187487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12633.

The product of its digits is 75264, while the sum is 42.

The square root of 61187487 is about 7822.2430926174. The cubic root of 61187487 is about 394.0526074893.

The spelling of 61187487 in words is "sixty-one million, one hundred eighty-seven thousand, four hundred eighty-seven".