61940261 has 2 divisors, whose sum is σ = 61940262. Its totient is φ = 61940260.

The previous prime is 61940251. The next prime is 61940273. The reversal of 61940261 is 16204916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41860900 + 20079361 = 6470^2 + 4481^2 .

It is a cyclic number.

It is not a de Polignac number, because 61940261 - 2¹⁰ = 61939237 is a prime.

It is equal to p_3670283 and since 61940261 and 3670283 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61940251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30970130 + 30970131.

It is an arithmetic number, because the mean of its divisors is an integer number (30970131).

Almost surely, 2^61940261 is an apocalyptic number.

It is an amenable number.

61940261 is a deficient number, since it is larger than the sum of its proper divisors (1).

61940261 is an equidigital number, since it uses as much as digits as its factorization.

61940261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 61940261 is about 7870.2135295048. The cubic root of 61940261 is about 395.6620015772.

The spelling of 61940261 in words is "sixty-one million, nine hundred forty thousand, two hundred sixty-one".