77988741 has 8 divisors (see below), whose sum is σ = 110101824. Its totient is φ = 48934080.

The previous prime is 77988739. The next prime is 77988761. The reversal of 77988741 is 14788977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77988741 - 2¹ = 77988739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 1529191 = 77988741 / (7 + 7 + 9 + 8 + 8 + 7 + 4 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77988731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764545 + ... + 764646.

It is an arithmetic number, because the mean of its divisors is an integer number (13762728).

Almost surely, 2^77988741 is an apocalyptic number.

It is an amenable number.

77988741 is a deficient number, since it is larger than the sum of its proper divisors (32113083).

77988741 is a wasteful number, since it uses less digits than its factorization.

77988741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529211.

The product of its digits is 790272, while the sum is 51.

The square root of 77988741 is about 8831.1234279677. The cubic root of 77988741 is about 427.2453091190.

The spelling of 77988741 in words is "seventy-seven million, nine hundred eighty-eight thousand, seven hundred forty-one".