77245085 has 8 divisors (see below), whose sum is σ = 95199576. Its totient is φ = 60125760.

The previous prime is 77245081. The next prime is 77245097. The reversal of 77245085 is 58054277.

It can be written as a sum of positive squares in 4 ways, for example, as 48804196 + 28440889 = 6986^2 + 5333^2 .

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

It is not a de Polignac number, because 77245085 - 2² = 77245081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77245081) 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, 208586 + ... + 208955.

It is an arithmetic number, because the mean of its divisors is an integer number (11899947).

Almost surely, 2^77245085 is an apocalyptic number.

It is an amenable number.

77245085 is a deficient number, since it is larger than the sum of its proper divisors (17954491).

77245085 is a wasteful number, since it uses less digits than its factorization.

77245085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417583.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 77245085 is about 8788.9183065950. The cubic root of 77245085 is about 425.8829808558.

The spelling of 77245085 in words is "seventy-seven million, two hundred forty-five thousand, eighty-five".