61857903 has 8 divisors (see below), whose sum is σ = 82532016. Its totient is φ = 41211200.

The previous prime is 61857893. The next prime is 61857911. The reversal of 61857903 is 30975816.

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

It is a cyclic number.

It is not a de Polignac number, because 61857903 - 2⁵ = 61857871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61857923) 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 7 ways as a sum of consecutive naturals, for example, 828 + ... + 11153.

It is an arithmetic number, because the mean of its divisors is an integer number (10316502).

Almost surely, 2^61857903 is an apocalyptic number.

61857903 is a deficient number, since it is larger than the sum of its proper divisors (20674113).

61857903 is a wasteful number, since it uses less digits than its factorization.

61857903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13705.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 61857903 is about 7864.9795295347. The cubic root of 61857903 is about 395.4865616520.

The spelling of 61857903 in words is "sixty-one million, eight hundred fifty-seven thousand, nine hundred three".