61321959 has 12 divisors (see below), whose sum is σ = 88693800. Its totient is φ = 40827024.

The previous prime is 61321891. The next prime is 61321961. The reversal of 61321959 is 95912316.

It is not a de Polignac number, because 61321959 - 2⁷ = 61321831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61321969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3352 + ... + 11570.

It is an arithmetic number, because the mean of its divisors is an integer number (7391150).

Almost surely, 2^61321959 is an apocalyptic number.

61321959 is a deficient number, since it is larger than the sum of its proper divisors (27371841).

61321959 is a wasteful number, since it uses less digits than its factorization.

61321959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9054 (or 9051 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 61321959 is about 7830.8338636444. The cubic root of 61321959 is about 394.3410666393.

It can be divided in two parts, 613219 and 59, that added together give a triangular number (613278 = T₁₁₀₇).

The spelling of 61321959 in words is "sixty-one million, three hundred twenty-one thousand, nine hundred fifty-nine".