61887506 has 8 divisors (see below), whose sum is σ = 93011004. Its totient is φ = 30883840.

The previous prime is 61887499. The next prime is 61887509. The reversal of 61887506 is 60578816.

It can be written as a sum of positive squares in 2 ways, for example, as 57623281 + 4264225 = 7591^2 + 2065^2 .

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

It is not an unprimeable number, because it can be changed into a prime (61887509) 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, 28655 + ... + 30738.

Almost surely, 2^61887506 is an apocalyptic number.

61887506 is a deficient number, since it is larger than the sum of its proper divisors (31123498).

61887506 is a wasteful number, since it uses less digits than its factorization.

61887506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59916.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 61887506 is about 7866.8612546555. The cubic root of 61887506 is about 395.5496402078.

The spelling of 61887506 in words is "sixty-one million, eight hundred eighty-seven thousand, five hundred six".