61868461 has 2 divisors, whose sum is σ = 61868462. Its totient is φ = 61868460.

The previous prime is 61868419. The next prime is 61868473. The reversal of 61868461 is 16486816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40068900 + 21799561 = 6330^2 + 4669^2 .

It is a cyclic number.

It is not a de Polignac number, because 61868461 - 2¹³ = 61860269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61868561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30934230 + 30934231.

It is an arithmetic number, because the mean of its divisors is an integer number (30934231).

Almost surely, 2^61868461 is an apocalyptic number.

It is an amenable number.

61868461 is a deficient number, since it is larger than the sum of its proper divisors (1).

61868461 is an equidigital number, since it uses as much as digits as its factorization.

61868461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 40.

The square root of 61868461 is about 7865.6507041694. The cubic root of 61868461 is about 395.5090611192.

The spelling of 61868461 in words is "sixty-one million, eight hundred sixty-eight thousand, four hundred sixty-one".