77489941 has 2 divisors, whose sum is σ = 77489942. Its totient is φ = 77489940.

The previous prime is 77489917. The next prime is 77489957. The reversal of 77489941 is 14998477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69789316 + 7700625 = 8354^2 + 2775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77489941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77489911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38744970 + 38744971.

It is an arithmetic number, because the mean of its divisors is an integer number (38744971).

Almost surely, 2^77489941 is an apocalyptic number.

It is an amenable number.

77489941 is a deficient number, since it is larger than the sum of its proper divisors (1).

77489941 is an equidigital number, since it uses as much as digits as its factorization.

77489941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 77489941 is about 8802.8370994811. The cubic root of 77489941 is about 426.3325024985.

It can be divided in two parts, 7748 and 9941, that added together give a square (17689 = 133²).

The spelling of 77489941 in words is "seventy-seven million, four hundred eighty-nine thousand, nine hundred forty-one".