61933897 has 2 divisors, whose sum is σ = 61933898. Its totient is φ = 61933896.

The previous prime is 61933841. The next prime is 61933913. The reversal of 61933897 is 79833916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42889401 + 19044496 = 6549^2 + 4364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61933897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61933297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30966948 + 30966949.

It is an arithmetic number, because the mean of its divisors is an integer number (30966949).

Almost surely, 2^61933897 is an apocalyptic number.

It is an amenable number.

61933897 is a deficient number, since it is larger than the sum of its proper divisors (1).

61933897 is an equidigital number, since it uses as much as digits as its factorization.

61933897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 61933897 is about 7869.8092098856. The cubic root of 61933897 is about 395.6484504600.

The spelling of 61933897 in words is "sixty-one million, nine hundred thirty-three thousand, eight hundred ninety-seven".