61304387 has 4 divisors (see below), whose sum is σ = 61466520. Its totient is φ = 61142256.

The previous prime is 61304377. The next prime is 61304417. The reversal of 61304387 is 78340316.

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 61304387 - 2⁴ = 61304371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61304377) 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, 80498 + ... + 81255.

It is an arithmetic number, because the mean of its divisors is an integer number (15366630).

Almost surely, 2^61304387 is an apocalyptic number.

61304387 is a deficient number, since it is larger than the sum of its proper divisors (162133).

61304387 is a wasteful number, since it uses less digits than its factorization.

61304387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162132.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 61304387 is about 7829.7118082341. The cubic root of 61304387 is about 394.3033964837.

The spelling of 61304387 in words is "sixty-one million, three hundred four thousand, three hundred eighty-seven".