78245653 has 2 divisors, whose sum is σ = 78245654. Its totient is φ = 78245652.

The previous prime is 78245617. The next prime is 78245659. The reversal of 78245653 is 35654287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41254929 + 36990724 = 6423^2 + 6082^2 .

It is a cyclic number.

It is not a de Polignac number, because 78245653 - 2¹⁷ = 78114581 is a prime.

It is a super-2 number, since 2×78245653² = 12244764426792818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78245659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39122826 + 39122827.

It is an arithmetic number, because the mean of its divisors is an integer number (39122827).

Almost surely, 2^78245653 is an apocalyptic number.

It is an amenable number.

78245653 is a deficient number, since it is larger than the sum of its proper divisors (1).

78245653 is an equidigital number, since it uses as much as digits as its factorization.

78245653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 40.

The square root of 78245653 is about 8845.6572960973. The cubic root of 78245653 is about 427.7139414548.

The spelling of 78245653 in words is "seventy-eight million, two hundred forty-five thousand, six hundred fifty-three".