77349401 has 2 divisors, whose sum is σ = 77349402. Its totient is φ = 77349400.

The previous prime is 77349397. The next prime is 77349407. The reversal of 77349401 is 10494377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76825225 + 524176 = 8765^2 + 724^2 .

It is an emirp because it is prime and its reverse (10494377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77349401 - 2² = 77349397 is a prime.

It is not a weakly prime, because it can be changed into another prime (77349407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38674700 + 38674701.

It is an arithmetic number, because the mean of its divisors is an integer number (38674701).

Almost surely, 2^77349401 is an apocalyptic number.

It is an amenable number.

77349401 is a deficient number, since it is larger than the sum of its proper divisors (1).

77349401 is an equidigital number, since it uses as much as digits as its factorization.

77349401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 77349401 is about 8794.8508230669. The cubic root of 77349401 is about 426.0746065339.

The spelling of 77349401 in words is "seventy-seven million, three hundred forty-nine thousand, four hundred one".