61636369 has 2 divisors, whose sum is σ = 61636370. Its totient is φ = 61636368.

The previous prime is 61636357. The next prime is 61636409. The reversal of 61636369 is 96363616.

It is an a-pointer prime, because the next prime (61636409) can be obtained adding 61636369 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33408400 + 28227969 = 5780^2 + 5313^2 .

It is a cyclic number.

It is not a de Polignac number, because 61636369 - 2⁷ = 61636241 is a prime.

It is a super-2 number, since 2×61636369² = 7598083967008322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (61636319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30818184 + 30818185.

It is an arithmetic number, because the mean of its divisors is an integer number (30818185).

Almost surely, 2^61636369 is an apocalyptic number.

It is an amenable number.

61636369 is a deficient number, since it is larger than the sum of its proper divisors (1).

61636369 is an equidigital number, since it uses as much as digits as its factorization.

61636369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 40.

The square root of 61636369 is about 7850.8833260978. The cubic root of 61636369 is about 395.0138733577.

The spelling of 61636369 in words is "sixty-one million, six hundred thirty-six thousand, three hundred sixty-nine".