61487986 has 8 divisors (see below), whose sum is σ = 105408000. Its totient is φ = 26351988.

The previous prime is 61487983. The next prime is 61487989. The reversal of 61487986 is 68978416.

It is an interprime number because it is at equal distance from previous prime (61487983) and next prime (61487989).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61487983) 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, 2195986 + ... + 2196013.

It is an arithmetic number, because the mean of its divisors is an integer number (13176000).

Almost surely, 2^61487986 is an apocalyptic number.

61487986 is a deficient number, since it is larger than the sum of its proper divisors (43920014).

61487986 is a wasteful number, since it uses less digits than its factorization.

61487986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392008.

The product of its digits is 580608, while the sum is 49.

The square root of 61487986 is about 7841.4275486036. The cubic root of 61487986 is about 394.6966340251.

The spelling of 61487986 in words is "sixty-one million, four hundred eighty-seven thousand, nine hundred eighty-six".