61612997 has 2 divisors, whose sum is σ = 61612998. Its totient is φ = 61612996.

The previous prime is 61612951. The next prime is 61613011. The reversal of 61612997 is 79921616.

61612997 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., 43217476 + 18395521 = 6574^2 + 4289^2 .

It is a cyclic number.

It is not a de Polignac number, because 61612997 - 2¹⁸ = 61350853 is a prime.

It is a super-2 number, since 2×61612997² = 7592322798644018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61614997) 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, 30806498 + 30806499.

It is an arithmetic number, because the mean of its divisors is an integer number (30806499).

Almost surely, 2^61612997 is an apocalyptic number.

It is an amenable number.

61612997 is a deficient number, since it is larger than the sum of its proper divisors (1).

61612997 is an equidigital number, since it uses as much as digits as its factorization.

61612997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 61612997 is about 7849.3946900382. The cubic root of 61612997 is about 394.9639383839.

The spelling of 61612997 in words is "sixty-one million, six hundred twelve thousand, nine hundred ninety-seven".