78949153 has 2 divisors, whose sum is σ = 78949154. Its totient is φ = 78949152.

The previous prime is 78949151. The next prime is 78949183. The reversal of 78949153 is 35194987.

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., 78730129 + 219024 = 8873^2 + 468^2 .

It is a cyclic number.

It is not a de Polignac number, because 78949153 - 2¹ = 78949151 is a prime.

Together with 78949151, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78949151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39474576 + 39474577.

It is an arithmetic number, because the mean of its divisors is an integer number (39474577).

Almost surely, 2^78949153 is an apocalyptic number.

It is an amenable number.

78949153 is a deficient number, since it is larger than the sum of its proper divisors (1).

78949153 is an equidigital number, since it uses as much as digits as its factorization.

78949153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 78949153 is about 8885.3335896859. Note that the first 3 decimals coincide. The cubic root of 78949153 is about 428.9919654079.

The spelling of 78949153 in words is "seventy-eight million, nine hundred forty-nine thousand, one hundred fifty-three".