61840501 has 2 divisors, whose sum is σ = 61840502. Its totient is φ = 61840500.

The previous prime is 61840477. The next prime is 61840523. The reversal of 61840501 is 10504816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32148900 + 29691601 = 5670^2 + 5449^2 .

It is a cyclic number.

It is not a de Polignac number, because 61840501 - 2⁵ = 61840469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61840591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30920250 + 30920251.

It is an arithmetic number, because the mean of its divisors is an integer number (30920251).

Almost surely, 2^61840501 is an apocalyptic number.

It is an amenable number.

61840501 is a deficient number, since it is larger than the sum of its proper divisors (1).

61840501 is an equidigital number, since it uses as much as digits as its factorization.

61840501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 61840501 is about 7863.8731551316. The cubic root of 61840501 is about 395.4494717934.

The spelling of 61840501 in words is "sixty-one million, eight hundred forty thousand, five hundred one".