77897503 has 2 divisors, whose sum is σ = 77897504. Its totient is φ = 77897502.

The previous prime is 77897453. The next prime is 77897531. The reversal of 77897503 is 30579877.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77897503 - 2⁹ = 77896991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77897593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38948751 + 38948752.

It is an arithmetic number, because the mean of its divisors is an integer number (38948752).

Almost surely, 2^77897503 is an apocalyptic number.

77897503 is a deficient number, since it is larger than the sum of its proper divisors (1).

77897503 is an equidigital number, since it uses as much as digits as its factorization.

77897503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 77897503 is about 8825.9562088195. The cubic root of 77897503 is about 427.0786345536.

It can be divided in two parts, 77897 and 503, that added together give a square (78400 = 280²).

The spelling of 77897503 in words is "seventy-seven million, eight hundred ninety-seven thousand, five hundred three".