61887451 has 4 divisors (see below), whose sum is σ = 61908400. Its totient is φ = 61866504.

The previous prime is 61887443. The next prime is 61887467. The reversal of 61887451 is 15478816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61887451 - 2³ = 61887443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61887751) 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, 5136 + ... + 12253.

It is an arithmetic number, because the mean of its divisors is an integer number (15477100).

Almost surely, 2^61887451 is an apocalyptic number.

61887451 is a deficient number, since it is larger than the sum of its proper divisors (20949).

61887451 is a wasteful number, since it uses less digits than its factorization.

61887451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20948.

The product of its digits is 53760, while the sum is 40.

The square root of 61887451 is about 7866.8577589785. The cubic root of 61887451 is about 395.5495230316.

The spelling of 61887451 in words is "sixty-one million, eight hundred eighty-seven thousand, four hundred fifty-one".