78453953 has 2 divisors, whose sum is σ = 78453954. Its totient is φ = 78453952.

The previous prime is 78453941. The next prime is 78454001. The reversal of 78453953 is 35935487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53333809 + 25120144 = 7303^2 + 5012^2 .

It is a cyclic number.

It is not a de Polignac number, because 78453953 - 2⁶ = 78453889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78453923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39226976 + 39226977.

It is an arithmetic number, because the mean of its divisors is an integer number (39226977).

Almost surely, 2^78453953 is an apocalyptic number.

It is an amenable number.

78453953 is a deficient number, since it is larger than the sum of its proper divisors (1).

78453953 is an equidigital number, since it uses as much as digits as its factorization.

78453953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 44.

The square root of 78453953 is about 8857.4236096057. The cubic root of 78453953 is about 428.0931483434.

The spelling of 78453953 in words is "seventy-eight million, four hundred fifty-three thousand, nine hundred fifty-three".