77000073431 has 2 divisors, whose sum is σ = 77000073432. Its totient is φ = 77000073430.

The previous prime is 77000073419. The next prime is 77000073433. The reversal of 77000073431 is 13437000077.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77000073431 - 2¹⁴ = 77000057047 is a prime.

It is a super-2 number, since 2×77000073431² (a number of 23 digits) contains 22 as substring.

Together with 77000073433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77000073433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38500036715 + 38500036716.

It is an arithmetic number, because the mean of its divisors is an integer number (38500036716).

Almost surely, 2^77000073431 is an apocalyptic number.

77000073431 is a deficient number, since it is larger than the sum of its proper divisors (1).

77000073431 is an equidigital number, since it uses as much as digits as its factorization.

77000073431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12348, while the sum is 32.

The spelling of 77000073431 in words is "seventy-seven billion, seventy-three thousand, four hundred thirty-one".