77138337 has 4 divisors (see below), whose sum is σ = 102851120. Its totient is φ = 51425556.

The previous prime is 77138329. The next prime is 77138351. The reversal of 77138337 is 73383177.

It is a happy number.

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.

It is not a de Polignac number, because 77138337 - 2³ = 77138329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77138295 and 77138304.

It is not an unprimeable number, because it can be changed into a prime (77138357) 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, 12856387 + ... + 12856392.

It is an arithmetic number, because the mean of its divisors is an integer number (25712780).

Almost surely, 2^77138337 is an apocalyptic number.

It is an amenable number.

77138337 is a deficient number, since it is larger than the sum of its proper divisors (25712783).

77138337 is a wasteful number, since it uses less digits than its factorization.

77138337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25712782.

The product of its digits is 74088, while the sum is 39.

The square root of 77138337 is about 8782.8433323156. The cubic root of 77138337 is about 425.6867089742.

The spelling of 77138337 in words is "seventy-seven million, one hundred thirty-eight thousand, three hundred thirty-seven".