77149141 has 2 divisors, whose sum is σ = 77149142. Its totient is φ = 77149140.

The previous prime is 77149133. The next prime is 77149169. The reversal of 77149141 is 14194177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45508516 + 31640625 = 6746^2 + 5625^2 .

It is a cyclic number.

It is not a de Polignac number, because 77149141 - 2³ = 77149133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77149097 and 77149106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77149841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38574570 + 38574571.

It is an arithmetic number, because the mean of its divisors is an integer number (38574571).

Almost surely, 2^77149141 is an apocalyptic number.

It is an amenable number.

77149141 is a deficient number, since it is larger than the sum of its proper divisors (1).

77149141 is an equidigital number, since it uses as much as digits as its factorization.

77149141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 34.

The square root of 77149141 is about 8783.4583735565. The cubic root of 77149141 is about 425.7065819483.

The spelling of 77149141 in words is "seventy-seven million, one hundred forty-nine thousand, one hundred forty-one".