77948851 has 2 divisors, whose sum is σ = 77948852. Its totient is φ = 77948850.

The previous prime is 77948833. The next prime is 77948861. The reversal of 77948851 is 15884977.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77948851 - 2¹³ = 77940659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77948795 and 77948804.

It is not a weakly prime, because it can be changed into another prime (77948821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38974425 + 38974426.

It is an arithmetic number, because the mean of its divisors is an integer number (38974426).

Almost surely, 2^77948851 is an apocalyptic number.

77948851 is a deficient number, since it is larger than the sum of its proper divisors (1).

77948851 is an equidigital number, since it uses as much as digits as its factorization.

77948851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 49.

The square root of 77948851 is about 8828.8646495458. The cubic root of 77948851 is about 427.1724536371.

The spelling of 77948851 in words is "seventy-seven million, nine hundred forty-eight thousand, eight hundred fifty-one".