61996999 has 2 divisors, whose sum is σ = 61997000. Its totient is φ = 61996998.

The previous prime is 61996973. The next prime is 61997003. The reversal of 61996999 is 99969916.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61996999 - 2¹¹ = 61994951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61996969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30998499 + 30998500.

It is an arithmetic number, because the mean of its divisors is an integer number (30998500).

Almost surely, 2^61996999 is an apocalyptic number.

61996999 is a deficient number, since it is larger than the sum of its proper divisors (1).

61996999 is an equidigital number, since it uses as much as digits as its factorization.

61996999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2125764, while the sum is 58.

The square root of 61996999 is about 7873.8173080152. The cubic root of 61996999 is about 395.7827750410.

The spelling of 61996999 in words is "sixty-one million, nine hundred ninety-six thousand, nine hundred ninety-nine".