61871417 has 2 divisors, whose sum is σ = 61871418. Its totient is φ = 61871416.

The previous prime is 61871399. The next prime is 61871461. The reversal of 61871417 is 71417816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54922921 + 6948496 = 7411^2 + 2636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61871417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61871477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30935708 + 30935709.

It is an arithmetic number, because the mean of its divisors is an integer number (30935709).

Almost surely, 2^61871417 is an apocalyptic number.

It is an amenable number.

61871417 is a deficient number, since it is larger than the sum of its proper divisors (1).

61871417 is an equidigital number, since it uses as much as digits as its factorization.

61871417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 35.

The square root of 61871417 is about 7865.8386075485. The cubic root of 61871417 is about 395.5153599999.

The spelling of 61871417 in words is "sixty-one million, eight hundred seventy-one thousand, four hundred seventeen".