61909153 has 2 divisors, whose sum is σ = 61909154. Its totient is φ = 61909152.

The previous prime is 61909151. The next prime is 61909157. The reversal of 61909153 is 35190916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45319824 + 16589329 = 6732^2 + 4073^2 .

It is a cyclic number.

It is not a de Polignac number, because 61909153 - 2¹ = 61909151 is a prime.

Together with 61909151, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61909151) 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, 30954576 + 30954577.

It is an arithmetic number, because the mean of its divisors is an integer number (30954577).

Almost surely, 2^61909153 is an apocalyptic number.

It is an amenable number.

61909153 is a deficient number, since it is larger than the sum of its proper divisors (1).

61909153 is an equidigital number, since it uses as much as digits as its factorization.

61909153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 61909153 is about 7868.2369689785. The cubic root of 61909153 is about 395.5957532576.

It can be divided in two parts, 619091 and 53, that multiplied together give a palindrome (32811823).

The spelling of 61909153 in words is "sixty-one million, nine hundred nine thousand, one hundred fifty-three".