61788953 has 2 divisors, whose sum is σ = 61788954. Its totient is φ = 61788952.

The previous prime is 61788949. The next prime is 61788977. The reversal of 61788953 is 35988716.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41113744 + 20675209 = 6412^2 + 4547^2 .

It is a cyclic number.

It is not a de Polignac number, because 61788953 - 2² = 61788949 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61788898 and 61788907.

It is not a weakly prime, because it can be changed into another prime (61788943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30894476 + 30894477.

It is an arithmetic number, because the mean of its divisors is an integer number (30894477).

Almost surely, 2^61788953 is an apocalyptic number.

It is an amenable number.

61788953 is a deficient number, since it is larger than the sum of its proper divisors (1).

61788953 is an equidigital number, since it uses as much as digits as its factorization.

61788953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 61788953 is about 7860.5949520377. The cubic root of 61788953 is about 395.3395638009.

The spelling of 61788953 in words is "sixty-one million, seven hundred eighty-eight thousand, nine hundred fifty-three".