61313587 has 4 divisors (see below), whose sum is σ = 61393680. Its totient is φ = 61233496.

The previous prime is 61313579. The next prime is 61313617. The reversal of 61313587 is 78531316.

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 61313587 - 2³ = 61313579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61313507) 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, 38887 + ... + 40432.

It is an arithmetic number, because the mean of its divisors is an integer number (15348420).

Almost surely, 2^61313587 is an apocalyptic number.

61313587 is a deficient number, since it is larger than the sum of its proper divisors (80093).

61313587 is an equidigital number, since it uses as much as digits as its factorization.

61313587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80092.

The product of its digits is 15120, while the sum is 34.

The square root of 61313587 is about 7830.2992918534. The cubic root of 61313587 is about 394.3231199759.

The spelling of 61313587 in words is "sixty-one million, three hundred thirteen thousand, five hundred eighty-seven".