61844513 has 2 divisors, whose sum is σ = 61844514. Its totient is φ = 61844512.

The previous prime is 61844483. The next prime is 61844537. The reversal of 61844513 is 31544816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35916049 + 25928464 = 5993^2 + 5092^2 .

It is a cyclic number.

It is not a de Polignac number, because 61844513 - 2⁸ = 61844257 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61844513.

It is not a weakly prime, because it can be changed into another prime (61844543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30922256 + 30922257.

It is an arithmetic number, because the mean of its divisors is an integer number (30922257).

Almost surely, 2^61844513 is an apocalyptic number.

It is an amenable number.

61844513 is a deficient number, since it is larger than the sum of its proper divisors (1).

61844513 is an equidigital number, since it uses as much as digits as its factorization.

61844513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 61844513 is about 7864.1282415790. The cubic root of 61844513 is about 395.4580234111.

The spelling of 61844513 in words is "sixty-one million, eight hundred forty-four thousand, five hundred thirteen".