61873957 has 8 divisors (see below), whose sum is σ = 62904600. Its totient is φ = 60850944.

The previous prime is 61873943. The next prime is 61873991. The reversal of 61873957 is 75937816.

61873957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 7866²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 5788836 + 56085121 = 2406^2 + 7489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61873957 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 (61873057) 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 7 ways as a sum of consecutive naturals, for example, 15769 + ... + 19297.

It is an arithmetic number, because the mean of its divisors is an integer number (7863075).

Almost surely, 2^61873957 is an apocalyptic number.

It is an amenable number.

61873957 is a deficient number, since it is larger than the sum of its proper divisors (1030643).

61873957 is a wasteful number, since it uses less digits than its factorization.

61873957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3815.

The product of its digits is 317520, while the sum is 46.

The square root of 61873957 is about 7866.0000635647. Note that the first 4 decimals coincide. The cubic root of 61873957 is about 395.5207722743.

The spelling of 61873957 in words is "sixty-one million, eight hundred seventy-three thousand, nine hundred fifty-seven".