78402743 has 2 divisors, whose sum is σ = 78402744. Its totient is φ = 78402742.

The previous prime is 78402697. The next prime is 78402749. The reversal of 78402743 is 34720487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78402743 - 2¹⁴ = 78386359 is a prime.

It is a super-2 number, since 2×78402743² = 12293980219848098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78402749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39201371 + 39201372.

It is an arithmetic number, because the mean of its divisors is an integer number (39201372).

Almost surely, 2^78402743 is an apocalyptic number.

78402743 is a deficient number, since it is larger than the sum of its proper divisors (1).

78402743 is an equidigital number, since it uses as much as digits as its factorization.

78402743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 78402743 is about 8854.5323422528. The cubic root of 78402743 is about 427.9999836230. Note that the first 4 decimals are identical.

The spelling of 78402743 in words is "seventy-eight million, four hundred two thousand, seven hundred forty-three".