61887507 has 20 divisors (see below), whose sum is σ = 90832200. Its totient is φ = 37480960.

The previous prime is 61887499. The next prime is 61887509. The reversal of 61887507 is 70578816.

It is not a de Polignac number, because 61887507 - 2³ = 61887499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61887509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43219 + ... + 44627.

It is an arithmetic number, because the mean of its divisors is an integer number (4541610).

Almost surely, 2^61887507 is an apocalyptic number.

61887507 is a deficient number, since it is larger than the sum of its proper divisors (28944693).

61887507 is an equidigital number, since it uses as much as digits as its factorization.

61887507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456 (or 1423 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 61887507 is about 7866.8613182133. The cubic root of 61887507 is about 395.5496423383.

It can be divided in two parts, 6188 and 7507, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 61887507 in words is "sixty-one million, eight hundred eighty-seven thousand, five hundred seven".