61338887 has 4 divisors (see below), whose sum is σ = 61354560. Its totient is φ = 61323216.

The previous prime is 61338847. The next prime is 61338899. The reversal of 61338887 is 78883316.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61338887 - 2¹⁶ = 61273351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61338847) 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, 3539 + ... + 11627.

It is an arithmetic number, because the mean of its divisors is an integer number (15338640).

Almost surely, 2^61338887 is an apocalyptic number.

61338887 is a deficient number, since it is larger than the sum of its proper divisors (15673).

61338887 is an equidigital number, since it uses as much as digits as its factorization.

61338887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15672.

The product of its digits is 193536, while the sum is 44.

The square root of 61338887 is about 7831.9146445809. The cubic root of 61338887 is about 394.3773494083.

The spelling of 61338887 in words is "sixty-one million, three hundred thirty-eight thousand, eight hundred eighty-seven".