77673131 has 2 divisors, whose sum is σ = 77673132. Its totient is φ = 77673130.

The previous prime is 77673103. The next prime is 77673137. The reversal of 77673131 is 13137677.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77673131 - 2¹⁰ = 77672107 is a prime.

It is a super-2 number, since 2×77673131² = 12066230558686322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 77673091 and 77673100.

It is not a weakly prime, because it can be changed into another prime (77673137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38836565 + 38836566.

It is an arithmetic number, because the mean of its divisors is an integer number (38836566).

Almost surely, 2^77673131 is an apocalyptic number.

77673131 is a deficient number, since it is larger than the sum of its proper divisors (1).

77673131 is an equidigital number, since it uses as much as digits as its factorization.

77673131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18522, while the sum is 35.

The square root of 77673131 is about 8813.2361252834. The cubic root of 77673131 is about 426.6681950493.

The spelling of 77673131 in words is "seventy-seven million, six hundred seventy-three thousand, one hundred thirty-one".