61306253 has 2 divisors, whose sum is σ = 61306254. Its totient is φ = 61306252.

The previous prime is 61306241. The next prime is 61306279. The reversal of 61306253 is 35260316.

It is an a-pointer prime, because the next prime (61306279) can be obtained adding 61306253 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39980329 + 21325924 = 6323^2 + 4618^2 .

It is a cyclic number.

It is not a de Polignac number, because 61306253 - 2²² = 57111949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61306153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30653126 + 30653127.

It is an arithmetic number, because the mean of its divisors is an integer number (30653127).

Almost surely, 2^61306253 is an apocalyptic number.

It is an amenable number.

61306253 is a deficient number, since it is larger than the sum of its proper divisors (1).

61306253 is an equidigital number, since it uses as much as digits as its factorization.

61306253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 61306253 is about 7829.8309688013. The cubic root of 61306253 is about 394.3073970820.

Adding to 61306253 its reverse (35260316), we get a palindrome (96566569).

The spelling of 61306253 in words is "sixty-one million, three hundred six thousand, two hundred fifty-three".