77312903 has 2 divisors, whose sum is σ = 77312904. Its totient is φ = 77312902.

The previous prime is 77312899. The next prime is 77312929. The reversal of 77312903 is 30921377.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77312903 - 2² = 77312899 is a prime.

It is a super-3 number, since 3×77312903³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77312903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77312993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38656451 + 38656452.

It is an arithmetic number, because the mean of its divisors is an integer number (38656452).

Almost surely, 2^77312903 is an apocalyptic number.

77312903 is a deficient number, since it is larger than the sum of its proper divisors (1).

77312903 is an equidigital number, since it uses as much as digits as its factorization.

77312903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 77312903 is about 8792.7756141050. The cubic root of 77312903 is about 426.0075802982.

The spelling of 77312903 in words is "seventy-seven million, three hundred twelve thousand, nine hundred three".