61873697 has 2 divisors, whose sum is σ = 61873698. Its totient is φ = 61873696.

The previous prime is 61873673. The next prime is 61873699. The reversal of 61873697 is 79637816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58354321 + 3519376 = 7639^2 + 1876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61873697 is a prime.

It is a super-3 number, since 3×61873697³ (a number of 24 digits) contains 333 as substring.

Together with 61873699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61873699) 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, 30936848 + 30936849.

It is an arithmetic number, because the mean of its divisors is an integer number (30936849).

Almost surely, 2^61873697 is an apocalyptic number.

It is an amenable number.

61873697 is a deficient number, since it is larger than the sum of its proper divisors (1).

61873697 is an equidigital number, since it uses as much as digits as its factorization.

61873697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 61873697 is about 7865.9835367232. The cubic root of 61873697 is about 395.5202182688.

The spelling of 61873697 in words is "sixty-one million, eight hundred seventy-three thousand, six hundred ninety-seven".