77419897 has 2 divisors, whose sum is σ = 77419898. Its totient is φ = 77419896.

The previous prime is 77419883. The next prime is 77419961. The reversal of 77419897 is 79891477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76457536 + 962361 = 8744^2 + 981^2 .

It is a cyclic number.

It is not a de Polignac number, because 77419897 - 2²³ = 69031289 is a prime.

It is not a weakly prime, because it can be changed into another prime (77419807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38709948 + 38709949.

It is an arithmetic number, because the mean of its divisors is an integer number (38709949).

Almost surely, 2^77419897 is an apocalyptic number.

It is an amenable number.

77419897 is a deficient number, since it is larger than the sum of its proper divisors (1).

77419897 is an equidigital number, since it uses as much as digits as its factorization.

77419897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 52.

The square root of 77419897 is about 8798.8577099530. The cubic root of 77419897 is about 426.2040082471.

The spelling of 77419897 in words is "seventy-seven million, four hundred nineteen thousand, eight hundred ninety-seven".