77740933 has 2 divisors, whose sum is σ = 77740934. Its totient is φ = 77740932.

The previous prime is 77740919. The next prime is 77740973. The reversal of 77740933 is 33904777.

It is a happy number.

It is an a-pointer prime, because the next prime (77740973) can be obtained adding 77740933 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77739489 + 1444 = 8817^2 + 38^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77740933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77740903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38870466 + 38870467.

It is an arithmetic number, because the mean of its divisors is an integer number (38870467).

Almost surely, 2^77740933 is an apocalyptic number.

It is an amenable number.

77740933 is a deficient number, since it is larger than the sum of its proper divisors (1).

77740933 is an equidigital number, since it uses as much as digits as its factorization.

77740933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 40.

The square root of 77740933 is about 8817.0818868830. The cubic root of 77740933 is about 426.7923072237.

The spelling of 77740933 in words is "seventy-seven million, seven hundred forty thousand, nine hundred thirty-three".