77954533 has 2 divisors, whose sum is σ = 77954534. Its totient is φ = 77954532.

The previous prime is 77954509. The next prime is 77954561. The reversal of 77954533 is 33545977.

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., 55845729 + 22108804 = 7473^2 + 4702^2 .

It is a cyclic number.

It is not a de Polignac number, because 77954533 - 2⁵ = 77954501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77954533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77957533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38977266 + 38977267.

It is an arithmetic number, because the mean of its divisors is an integer number (38977267).

Almost surely, 2^77954533 is an apocalyptic number.

It is an amenable number.

77954533 is a deficient number, since it is larger than the sum of its proper divisors (1).

77954533 is an equidigital number, since it uses as much as digits as its factorization.

77954533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 43.

The square root of 77954533 is about 8829.1864291111. The cubic root of 77954533 is about 427.1828328147.

It can be divided in two parts, 77954 and 533, that added together give a palindrome (78487).

The spelling of 77954533 in words is "seventy-seven million, nine hundred fifty-four thousand, five hundred thirty-three".