61697873 has 2 divisors, whose sum is σ = 61697874. Its totient is φ = 61697872.

The previous prime is 61697869. The next prime is 61697903. The reversal of 61697873 is 37879616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55606849 + 6091024 = 7457^2 + 2468^2 .

It is a cyclic number.

It is not a de Polignac number, because 61697873 - 2² = 61697869 is a prime.

It is not a weakly prime, because it can be changed into another prime (61697803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30848936 + 30848937.

It is an arithmetic number, because the mean of its divisors is an integer number (30848937).

Almost surely, 2^61697873 is an apocalyptic number.

It is an amenable number.

61697873 is a deficient number, since it is larger than the sum of its proper divisors (1).

61697873 is an equidigital number, since it uses as much as digits as its factorization.

61697873 is an evil number, because the sum of its binary digits is even.

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

The square root of 61697873 is about 7854.7993609003. The cubic root of 61697873 is about 395.1452181964.

It can be divided in two parts, 616 and 97873, that added together give a palindrome (98489).

The spelling of 61697873 in words is "sixty-one million, six hundred ninety-seven thousand, eight hundred seventy-three".