77087013 has 4 divisors (see below), whose sum is σ = 102782688. Its totient is φ = 51391340.

The previous prime is 77086979. The next prime is 77087029. The reversal of 77087013 is 31078077.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31078077 = 3 ⋅10359359.

It is a cyclic number.

It is not a de Polignac number, because 77087013 - 2⁶ = 77086949 is a prime.

It is a super-3 number, since 3×77087013³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77087063) 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, 12847833 + ... + 12847838.

It is an arithmetic number, because the mean of its divisors is an integer number (25695672).

Almost surely, 2^77087013 is an apocalyptic number.

It is an amenable number.

77087013 is a deficient number, since it is larger than the sum of its proper divisors (25695675).

77087013 is a wasteful number, since it uses less digits than its factorization.

77087013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25695674.

The product of its (nonzero) digits is 8232, while the sum is 33.

The square root of 77087013 is about 8779.9210133121. The cubic root of 77087013 is about 425.5922777969.

The spelling of 77087013 in words is "seventy-seven million, eighty-seven thousand, thirteen".