77121234 has 40 divisors (see below), whose sum is σ = 173316528. Its totient is φ = 25631640.

The previous prime is 77121227. The next prime is 77121241. The reversal of 77121234 is 43212177.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77121227) and next prime (77121241).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 77121198 and 77121207.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 94689 + ... + 95499.

Almost surely, 2^77121234 is an apocalyptic number.

77121234 is an abundant number, since it is smaller than the sum of its proper divisors (96195294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77121234 is a wasteful number, since it uses less digits than its factorization.

77121234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1403 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 77121234 is about 8781.8696187088. The cubic root of 77121234 is about 425.6552457693.

The spelling of 77121234 in words is "seventy-seven million, one hundred twenty-one thousand, two hundred thirty-four".