77648953 has 8 divisors (see below), whose sum is σ = 81833600. Its totient is φ = 73474128.

The previous prime is 77648939. The next prime is 77648981. The reversal of 77648953 is 35984677.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77648953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77648897 and 77648906.

It is not an unprimeable number, because it can be changed into a prime (77648933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18400 + ... + 22222.

It is an arithmetic number, because the mean of its divisors is an integer number (10229200).

Almost surely, 2^77648953 is an apocalyptic number.

It is an amenable number.

77648953 is a deficient number, since it is larger than the sum of its proper divisors (4184647).

77648953 is a wasteful number, since it uses less digits than its factorization.

77648953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4911.

The product of its digits is 1270080, while the sum is 49.

The square root of 77648953 is about 8811.8643316837. The cubic root of 77648953 is about 426.6239195319.

It can be divided in two parts, 776 and 48953, that added together give a square (49729 = 223²).

The spelling of 77648953 in words is "seventy-seven million, six hundred forty-eight thousand, nine hundred fifty-three".