77067973 has 4 divisors (see below), whose sum is σ = 77185228. Its totient is φ = 76950720.

The previous prime is 77067967. The next prime is 77067979. The reversal of 77067973 is 37976077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37976077 = 149 ⋅254873.

It is an interprime number because it is at equal distance from previous prime (77067967) and next prime (77067979).

It can be written as a sum of positive squares in 2 ways, for example, as 38912644 + 38155329 = 6238^2 + 6177^2 .

It is a cyclic number.

It is not a de Polignac number, because 77067973 - 2⁵ = 77067941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77067979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57636 + ... + 58957.

It is an arithmetic number, because the mean of its divisors is an integer number (19296307).

Almost surely, 2^77067973 is an apocalyptic number.

It is an amenable number.

77067973 is a deficient number, since it is larger than the sum of its proper divisors (117255).

77067973 is a wasteful number, since it uses less digits than its factorization.

77067973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117254.

The product of its (nonzero) digits is 388962, while the sum is 46.

The square root of 77067973 is about 8778.8366541359. The cubic root of 77067973 is about 425.5572353866.

The spelling of 77067973 in words is "seventy-seven million, sixty-seven thousand, nine hundred seventy-three".