61281469 has 2 divisors, whose sum is σ = 61281470. Its totient is φ = 61281468.

The previous prime is 61281461. The next prime is 61281487. The reversal of 61281469 is 96418216.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43388569 + 17892900 = 6587^2 + 4230^2 .

It is a cyclic number.

It is not a de Polignac number, because 61281469 - 2³ = 61281461 is a prime.

It is a super-2 number, since 2×61281469² = 7510836885595922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61281461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30640734 + 30640735.

It is an arithmetic number, because the mean of its divisors is an integer number (30640735).

Almost surely, 2^61281469 is an apocalyptic number.

It is an amenable number.

61281469 is a deficient number, since it is larger than the sum of its proper divisors (1).

61281469 is an equidigital number, since it uses as much as digits as its factorization.

61281469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 61281469 is about 7828.2481437420. The cubic root of 61281469 is about 394.2542549677.

The spelling of 61281469 in words is "sixty-one million, two hundred eighty-one thousand, four hundred sixty-nine".