772987 has 2 divisors, whose sum is σ = 772988. Its totient is φ = 772986.

The previous prime is 772963. The next prime is 772991. The reversal of 772987 is 789277.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 772987 - 2⁷ = 772859 is a prime.

It is not a weakly prime, because it can be changed into another prime (772907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386493 + 386494.

It is an arithmetic number, because the mean of its divisors is an integer number (386494).

2⁷⁷²⁹⁸⁷ is an apocalyptic number.

772987 is a deficient number, since it is larger than the sum of its proper divisors (1).

772987 is an equidigital number, since it uses as much as digits as its factorization.

772987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 40.

The square root of 772987 is about 879.1967925328. The cubic root of 772987 is about 91.7749303026.

Subtracting 772987 from its reverse (789277), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 772987 in words is "seven hundred seventy-two thousand, nine hundred eighty-seven".