77349481 has 4 divisors (see below), whose sum is σ = 84381264. Its totient is φ = 70317700.

The previous prime is 77349479. The next prime is 77349487. The reversal of 77349481 is 18494377.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18494377 = 11 ⋅1681307.

It is a cyclic number.

It is not a de Polignac number, because 77349481 - 2¹ = 77349479 is a prime.

It is a super-2 number, since 2×77349481² = 11965884421938722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77349487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3515875 + ... + 3515896.

It is an arithmetic number, because the mean of its divisors is an integer number (21095316).

Almost surely, 2^77349481 is an apocalyptic number.

It is an amenable number.

77349481 is a deficient number, since it is larger than the sum of its proper divisors (7031783).

77349481 is a wasteful number, since it uses less digits than its factorization.

77349481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7031782.

The product of its digits is 169344, while the sum is 43.

The square root of 77349481 is about 8794.8553711815. The cubic root of 77349481 is about 426.0747534257.

The spelling of 77349481 in words is "seventy-seven million, three hundred forty-nine thousand, four hundred eighty-one".