61870577 has 4 divisors (see below), whose sum is σ = 62508516. Its totient is φ = 61232640.

The previous prime is 61870573. The next prime is 61870583. The reversal of 61870577 is 77507816.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47665216 + 14205361 = 6904^2 + 3769^2 .

It is a cyclic number.

It is not a de Polignac number, because 61870577 - 2² = 61870573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61870573) 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, 318824 + ... + 319017.

It is an arithmetic number, because the mean of its divisors is an integer number (15627129).

Almost surely, 2^61870577 is an apocalyptic number.

It is an amenable number.

61870577 is a deficient number, since it is larger than the sum of its proper divisors (637939).

61870577 is an equidigital number, since it uses as much as digits as its factorization.

61870577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637938.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 61870577 is about 7865.7852119162. The cubic root of 61870577 is about 395.5135700813.

The spelling of 61870577 in words is "sixty-one million, eight hundred seventy thousand, five hundred seventy-seven".