61743557 has 4 divisors (see below), whose sum is σ = 61778496. Its totient is φ = 61708620.

The previous prime is 61743553. The next prime is 61743587. The reversal of 61743557 is 75534716.

61743557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61743557 - 2² = 61743553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61743557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61743553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14669 + ... + 18402.

It is an arithmetic number, because the mean of its divisors is an integer number (15444624).

Almost surely, 2^61743557 is an apocalyptic number.

It is an amenable number.

61743557 is a deficient number, since it is larger than the sum of its proper divisors (34939).

61743557 is a wasteful number, since it uses less digits than its factorization.

61743557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34938.

The product of its digits is 88200, while the sum is 38.

The square root of 61743557 is about 7857.7068537837. The cubic root of 61743557 is about 395.2427221547.

The spelling of 61743557 in words is "sixty-one million, seven hundred forty-three thousand, five hundred fifty-seven".