77496949 has 2 divisors, whose sum is σ = 77496950. Its totient is φ = 77496948.

The previous prime is 77496941. The next prime is 77496989. The reversal of 77496949 is 94969477.

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., 41280625 + 36216324 = 6425^2 + 6018^2 .

It is an emirp because it is prime and its reverse (94969477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77496949 - 2³ = 77496941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77496949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77496941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38748474 + 38748475.

It is an arithmetic number, because the mean of its divisors is an integer number (38748475).

Almost surely, 2^77496949 is an apocalyptic number.

It is an amenable number.

77496949 is a deficient number, since it is larger than the sum of its proper divisors (1).

77496949 is an equidigital number, since it uses as much as digits as its factorization.

77496949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 55.

The square root of 77496949 is about 8803.2351439684. The cubic root of 77496949 is about 426.3453542659.

The spelling of 77496949 in words is "seventy-seven million, four hundred ninety-six thousand, nine hundred forty-nine".