77344121 has 4 divisors (see below), whose sum is σ = 77685072. Its totient is φ = 77003172.

The previous prime is 77344109. The next prime is 77344123. The reversal of 77344121 is 12144377.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77344121 is a prime.

It is a super-2 number, since 2×77344121² = 11964226106525282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77344123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170135 + ... + 170588.

It is an arithmetic number, because the mean of its divisors is an integer number (19421268).

Almost surely, 2^77344121 is an apocalyptic number.

It is an amenable number.

77344121 is a deficient number, since it is larger than the sum of its proper divisors (340951).

77344121 is a wasteful number, since it uses less digits than its factorization.

77344121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340950.

The product of its digits is 4704, while the sum is 29.

The square root of 77344121 is about 8794.5506423012. The cubic root of 77344121 is about 426.0649114573.

Adding to 77344121 its reverse (12144377), we get a palindrome (89488498).

The spelling of 77344121 in words is "seventy-seven million, three hundred forty-four thousand, one hundred twenty-one".