61301987 has 4 divisors (see below), whose sum is σ = 61317816. Its totient is φ = 61286160.

The previous prime is 61301971. The next prime is 61301993. The reversal of 61301987 is 78910316.

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 61301987 - 2⁴ = 61301971 is a prime.

It is a super-2 number, since 2×61301987² = 7515867220296338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61301917) 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, 2228 + ... + 11294.

It is an arithmetic number, because the mean of its divisors is an integer number (15329454).

Almost surely, 2^61301987 is an apocalyptic number.

61301987 is a deficient number, since it is larger than the sum of its proper divisors (15829).

61301987 is an equidigital number, since it uses as much as digits as its factorization.

61301987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15828.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 61301987 is about 7829.5585443881. The cubic root of 61301987 is about 394.2982509004.

The spelling of 61301987 in words is "sixty-one million, three hundred one thousand, nine hundred eighty-seven".