61887757 has 4 divisors (see below), whose sum is σ = 61936416. Its totient is φ = 61839100.

The previous prime is 61887751. The next prime is 61887773. The reversal of 61887757 is 75778816.

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 a de Polignac number, because none of the positive numbers 2^k-61887757 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61887757.

It is a congruent 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, 22369 + ... + 24982.

It is an arithmetic number, because the mean of its divisors is an integer number (15484104).

Almost surely, 2^61887757 is an apocalyptic number.

It is an amenable number.

61887757 is a deficient number, since it is larger than the sum of its proper divisors (48659).

61887757 is a wasteful number, since it uses less digits than its factorization.

61887757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48658.

The product of its digits is 658560, while the sum is 49.

The square root of 61887757 is about 7866.8772076346. The cubic root of 61887757 is about 395.5501749567.

The spelling of 61887757 in words is "sixty-one million, eight hundred eighty-seven thousand, seven hundred fifty-seven".