61087313 has 4 divisors (see below), whose sum is σ = 69814080. Its totient is φ = 52360548.

The previous prime is 61087309. The next prime is 61087321. The reversal of 61087313 is 31378016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61087313 - 2² = 61087309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61087373) 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, 4363373 + ... + 4363386.

It is an arithmetic number, because the mean of its divisors is an integer number (17453520).

Almost surely, 2^61087313 is an apocalyptic number.

It is an amenable number.

61087313 is a deficient number, since it is larger than the sum of its proper divisors (8726767).

61087313 is an equidigital number, since it uses as much as digits as its factorization.

61087313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8726766.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 61087313 is about 7815.8373191872. The cubic root of 61087313 is about 393.8374470092.

The spelling of 61087313 in words is "sixty-one million, eighty-seven thousand, three hundred thirteen".