61897841 has 2 divisors, whose sum is σ = 61897842. Its totient is φ = 61897840.

The previous prime is 61897819. The next prime is 61897873. The reversal of 61897841 is 14879816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52417600 + 9480241 = 7240^2 + 3079^2 .

It is a cyclic number.

It is not a de Polignac number, because 61897841 - 2⁶ = 61897777 is a prime.

It is a super-2 number, since 2×61897841² = 7662685440922562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61897792 and 61897801.

It is not a weakly prime, because it can be changed into another prime (61897811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30948920 + 30948921.

It is an arithmetic number, because the mean of its divisors is an integer number (30948921).

Almost surely, 2^61897841 is an apocalyptic number.

It is an amenable number.

61897841 is a deficient number, since it is larger than the sum of its proper divisors (1).

61897841 is an equidigital number, since it uses as much as digits as its factorization.

61897841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 44.

The square root of 61897841 is about 7867.5180965791. The cubic root of 61897841 is about 395.5716574574.

The spelling of 61897841 in words is "sixty-one million, eight hundred ninety-seven thousand, eight hundred forty-one".