77146989 has 8 divisors (see below), whose sum is σ = 106409760. Its totient is φ = 49657776.

The previous prime is 77146981. The next prime is 77147009. The reversal of 77146989 is 98964177.

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

It is not a de Polignac number, because 77146989 - 2³ = 77146981 is a prime.

It is a super-2 number, since 2×77146989² = 11903315823532242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77146981) 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, 443287 + ... + 443460.

It is an arithmetic number, because the mean of its divisors is an integer number (13301220).

Almost surely, 2^77146989 is an apocalyptic number.

It is an amenable number.

77146989 is a deficient number, since it is larger than the sum of its proper divisors (29262771).

77146989 is a wasteful number, since it uses less digits than its factorization.

77146989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886779.

The product of its digits is 762048, while the sum is 51.

The square root of 77146989 is about 8783.3358697024. The cubic root of 77146989 is about 425.7026236882.

The spelling of 77146989 in words is "seventy-seven million, one hundred forty-six thousand, nine hundred eighty-nine".