77620243 has 8 divisors (see below), whose sum is σ = 79978016. Its totient is φ = 75297600.

The previous prime is 77620229. The next prime is 77620271. The reversal of 77620243 is 34202677.

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-77620243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77620843) 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, 4263 + ... + 13168.

It is an arithmetic number, because the mean of its divisors is an integer number (9997252).

Almost surely, 2^77620243 is an apocalyptic number.

77620243 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

77620243 is a deficient number, since it is larger than the sum of its proper divisors (2357773).

77620243 is a wasteful number, since it uses less digits than its factorization.

77620243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17565.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 77620243 is about 8810.2351273959. The cubic root of 77620243 is about 426.5713329349.

The spelling of 77620243 in words is "seventy-seven million, six hundred twenty thousand, two hundred forty-three".