61487269 has 2 divisors, whose sum is σ = 61487270. Its totient is φ = 61487268.

The previous prime is 61487191. The next prime is 61487273. The reversal of 61487269 is 96278416.

61487269 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 can be written as a sum of positive squares in only one way, i.e., 39753025 + 21734244 = 6305^2 + 4662^2 .

It is a cyclic number.

It is not a de Polignac number, because 61487269 - 2¹⁹ = 60962981 is a prime.

It is a super-2 number, since 2×61487269² = 7561368498156722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61487869) 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, 30743634 + 30743635.

It is an arithmetic number, because the mean of its divisors is an integer number (30743635).

Almost surely, 2^61487269 is an apocalyptic number.

It is an amenable number.

61487269 is a deficient number, since it is larger than the sum of its proper divisors (1).

61487269 is an equidigital number, since it uses as much as digits as its factorization.

61487269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 61487269 is about 7841.3818297542. The cubic root of 61487269 is about 394.6950998577.

The spelling of 61487269 in words is "sixty-one million, four hundred eighty-seven thousand, two hundred sixty-nine".