77121343 has 4 divisors (see below), whose sum is σ = 83053768. Its totient is φ = 71188920.

The previous prime is 77121337. The next prime is 77121349. The reversal of 77121343 is 34312177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34312177 = 199 ⋅172423.

It is an interprime number because it is at equal distance from previous prime (77121337) and next prime (77121349).

It is a cyclic number.

It is not a de Polignac number, because 77121343 - 2⁵ = 77121311 is a prime.

It is a super-2 number, since 2×77121343² = 11895403092247298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77121349) 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, 2966193 + ... + 2966218.

It is an arithmetic number, because the mean of its divisors is an integer number (20763442).

Almost surely, 2^77121343 is an apocalyptic number.

77121343 is a deficient number, since it is larger than the sum of its proper divisors (5932425).

77121343 is a wasteful number, since it uses less digits than its factorization.

77121343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932424.

The product of its digits is 3528, while the sum is 28.

The square root of 77121343 is about 8781.8758246744. The cubic root of 77121343 is about 425.6554463038.

The spelling of 77121343 in words is "seventy-seven million, one hundred twenty-one thousand, three hundred forty-three".