77740934 has 4 divisors (see below), whose sum is σ = 116611404. Its totient is φ = 38870466.

The previous prime is 77740933. The next prime is 77740973. The reversal of 77740934 is 43904777.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77740891 and 77740900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77740933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19435232 + ... + 19435235.

It is an arithmetic number, because the mean of its divisors is an integer number (29152851).

Almost surely, 2^77740934 is an apocalyptic number.

77740934 is a deficient number, since it is larger than the sum of its proper divisors (38870470).

77740934 is a wasteful number, since it uses less digits than its factorization.

77740934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38870469.

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 77740934 is about 8817.0819435911. The cubic root of 77740934 is about 426.7923090537.

The spelling of 77740934 in words is "seventy-seven million, seven hundred forty thousand, nine hundred thirty-four".