78975653 has 2 divisors, whose sum is σ = 78975654. Its totient is φ = 78975652.

The previous prime is 78975599. The next prime is 78975683. The reversal of 78975653 is 35657987.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47087044 + 31888609 = 6862^2 + 5647^2 .

It is a cyclic number.

It is not a de Polignac number, because 78975653 - 2⁸ = 78975397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78975683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39487826 + 39487827.

It is an arithmetic number, because the mean of its divisors is an integer number (39487827).

Almost surely, 2^78975653 is an apocalyptic number.

It is an amenable number.

78975653 is a deficient number, since it is larger than the sum of its proper divisors (1).

78975653 is an equidigital number, since it uses as much as digits as its factorization.

78975653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 50.

The square root of 78975653 is about 8886.8246860169. The cubic root of 78975653 is about 429.0399583879.

The spelling of 78975653 in words is "seventy-eight million, nine hundred seventy-five thousand, six hundred fifty-three".