511077987 has 36 divisors (see below), whose sum is σ = 909278136. Its totient is φ = 274861440.

The previous prime is 511077977. The next prime is 511078027. The reversal of 511077987 is 789770115.

It is a happy number.

It is not a de Polignac number, because 511077987 - 2⁴ = 511077971 is a prime.

It is a super-2 number, since 2×511077987² = 522401417591944338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511077937) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26589 + ... + 41582.

It is an arithmetic number, because the mean of its divisors is an integer number (25257726).

Almost surely, 2^511077987 is an apocalyptic number.

511077987 is a deficient number, since it is larger than the sum of its proper divisors (398200149).

511077987 is a wasteful number, since it uses less digits than its factorization.

511077987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68208 (or 68198 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 45.

The square root of 511077987 is about 22607.0340159871. The cubic root of 511077987 is about 799.5194963489.

The spelling of 511077987 in words is "five hundred eleven million, seventy-seven thousand, nine hundred eighty-seven".