61746857 has 2 divisors, whose sum is σ = 61746858. Its totient is φ = 61746856.

The previous prime is 61746847. The next prime is 61746869. The reversal of 61746857 is 75864716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57320041 + 4426816 = 7571^2 + 2104^2 .

It is a cyclic number.

It is not a de Polignac number, because 61746857 - 2¹⁰ = 61745833 is a prime.

It is a Chen prime.

It is equal to p_3659498 and since 61746857 and 3659498 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (61746847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30873428 + 30873429.

It is an arithmetic number, because the mean of its divisors is an integer number (30873429).

Almost surely, 2^61746857 is an apocalyptic number.

It is an amenable number.

61746857 is a deficient number, since it is larger than the sum of its proper divisors (1).

61746857 is an equidigital number, since it uses as much as digits as its factorization.

61746857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 44.

The square root of 61746857 is about 7857.9168359050. The cubic root of 61746857 is about 395.2497635250.

It can be divided in two parts, 6174 and 6857, that added together give a palindrome (13031).

The spelling of 61746857 in words is "sixty-one million, seven hundred forty-six thousand, eight hundred fifty-seven".