61577413 has 4 divisors (see below), whose sum is σ = 61846540. Its totient is φ = 61308288.

The previous prime is 61577389. The next prime is 61577437. The reversal of 61577413 is 31477516.

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

It is an interprime number because it is at equal distance from previous prime (61577389) and next prime (61577437).

It can be written as a sum of positive squares in 2 ways, for example, as 36397089 + 25180324 = 6033^2 + 5018^2 .

It is a cyclic number.

It is not a de Polignac number, because 61577413 - 2⁹ = 61576901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61577513) 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, 134220 + ... + 134677.

It is an arithmetic number, because the mean of its divisors is an integer number (15461635).

Almost surely, 2^61577413 is an apocalyptic number.

It is an amenable number.

61577413 is a deficient number, since it is larger than the sum of its proper divisors (269127).

61577413 is a wasteful number, since it uses less digits than its factorization.

61577413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269126.

The product of its digits is 17640, while the sum is 34.

The square root of 61577413 is about 7847.1276910727. The cubic root of 61577413 is about 394.8878878534.

The spelling of 61577413 in words is "sixty-one million, five hundred seventy-seven thousand, four hundred thirteen".