61959559 has 4 divisors (see below), whose sum is σ = 62147080. Its totient is φ = 61772040.

The previous prime is 61959529. The next prime is 61959563. The reversal of 61959559 is 95595916.

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 61959559 - 2¹³ = 61951367 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 (61959529) 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, 93264 + ... + 93925.

It is an arithmetic number, because the mean of its divisors is an integer number (15536770).

Almost surely, 2^61959559 is an apocalyptic number.

61959559 is a deficient number, since it is larger than the sum of its proper divisors (187521).

61959559 is a wasteful number, since it uses less digits than its factorization.

61959559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187520.

The product of its digits is 546750, while the sum is 49.

The square root of 61959559 is about 7871.4394490462. The cubic root of 61959559 is about 395.7030878990.

The spelling of 61959559 in words is "sixty-one million, nine hundred fifty-nine thousand, five hundred fifty-nine".