77153893 has 2 divisors, whose sum is σ = 77153894. Its totient is φ = 77153892.

The previous prime is 77153861. The next prime is 77153929. The reversal of 77153893 is 39835177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41177889 + 35976004 = 6417^2 + 5998^2 .

It is an emirp because it is prime and its reverse (39835177) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77153893 - 2⁵ = 77153861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77163893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38576946 + 38576947.

It is an arithmetic number, because the mean of its divisors is an integer number (38576947).

Almost surely, 2^77153893 is an apocalyptic number.

It is an amenable number.

77153893 is a deficient number, since it is larger than the sum of its proper divisors (1).

77153893 is an equidigital number, since it uses as much as digits as its factorization.

77153893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The square root of 77153893 is about 8783.7288778741. The cubic root of 77153893 is about 425.7153222320.

The spelling of 77153893 in words is "seventy-seven million, one hundred fifty-three thousand, eight hundred ninety-three".