77945371 has 8 divisors (see below), whose sum is σ = 89579520. Its totient is φ = 66436008.

The previous prime is 77945341. The next prime is 77945389. The reversal of 77945371 is 17354977.

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

It is a cyclic number.

It is not a de Polignac number, because 77945371 - 2¹¹ = 77943323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77945341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29851 + ... + 32356.

It is an arithmetic number, because the mean of its divisors is an integer number (11197440).

Almost surely, 2^77945371 is an apocalyptic number.

77945371 is a deficient number, since it is larger than the sum of its proper divisors (11634149).

77945371 is a wasteful number, since it uses less digits than its factorization.

77945371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62393.

The product of its digits is 185220, while the sum is 43.

The square root of 77945371 is about 8828.6675665131. The cubic root of 77945371 is about 427.1660965528.

The spelling of 77945371 in words is "seventy-seven million, nine hundred forty-five thousand, three hundred seventy-one".