61355207 has 2 divisors, whose sum is σ = 61355208. Its totient is φ = 61355206.

The previous prime is 61355179. The next prime is 61355209. The reversal of 61355207 is 70255316.

61355207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61355207 - 2¹² = 61351111 is a prime.

It is a super-2 number, since 2×61355207² = 7528922852025698, which contains 22 as substring.

Together with 61355209, it forms a pair of twin primes.

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 61355207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61355209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30677603 + 30677604.

It is an arithmetic number, because the mean of its divisors is an integer number (30677604).

Almost surely, 2^61355207 is an apocalyptic number.

61355207 is a deficient number, since it is larger than the sum of its proper divisors (1).

61355207 is an equidigital number, since it uses as much as digits as its factorization.

61355207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 61355207 is about 7832.9564661116. The cubic root of 61355207 is about 394.4123226959.

The spelling of 61355207 in words is "sixty-one million, three hundred fifty-five thousand, two hundred seven".