77240473 has 2 divisors, whose sum is σ = 77240474. Its totient is φ = 77240472.

The previous prime is 77240461. The next prime is 77240489. The reversal of 77240473 is 37404277.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73410624 + 3829849 = 8568^2 + 1957^2 .

It is a cyclic number.

It is not a de Polignac number, because 77240473 - 2⁵ = 77240441 is a prime.

It is not a weakly prime, because it can be changed into another prime (77240413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38620236 + 38620237.

It is an arithmetic number, because the mean of its divisors is an integer number (38620237).

Almost surely, 2^77240473 is an apocalyptic number.

It is an amenable number.

77240473 is a deficient number, since it is larger than the sum of its proper divisors (1).

77240473 is an equidigital number, since it uses as much as digits as its factorization.

77240473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 34.

The square root of 77240473 is about 8788.6559268184. The cubic root of 77240473 is about 425.8745047549.

The spelling of 77240473 in words is "seventy-seven million, two hundred forty thousand, four hundred seventy-three".