78026953 has 2 divisors, whose sum is σ = 78026954. Its totient is φ = 78026952.

The previous prime is 78026951. The next prime is 78026987. The reversal of 78026953 is 35962087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64689849 + 13337104 = 8043^2 + 3652^2 .

It is a cyclic number.

It is not a de Polignac number, because 78026953 - 2¹ = 78026951 is a prime.

Together with 78026951, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78026951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39013476 + 39013477.

It is an arithmetic number, because the mean of its divisors is an integer number (39013477).

Almost surely, 2^78026953 is an apocalyptic number.

It is an amenable number.

78026953 is a deficient number, since it is larger than the sum of its proper divisors (1).

78026953 is an equidigital number, since it uses as much as digits as its factorization.

78026953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 78026953 is about 8833.2866476754. The cubic root of 78026953 is about 427.3150765917.

The spelling of 78026953 in words is "seventy-eight million, twenty-six thousand, nine hundred fifty-three".