78461011 has 2 divisors, whose sum is σ = 78461012. Its totient is φ = 78461010.

The previous prime is 78460999. The next prime is 78461017. The reversal of 78461011 is 11016487.

It is a strong prime.

It is an emirp because it is prime and its reverse (11016487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78461011 - 2⁷ = 78460883 is a prime.

It is a super-2 number, since 2×78461011² = 12312260494284242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78461017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39230505 + 39230506.

It is an arithmetic number, because the mean of its divisors is an integer number (39230506).

Almost surely, 2^78461011 is an apocalyptic number.

78461011 is a deficient number, since it is larger than the sum of its proper divisors (1).

78461011 is an equidigital number, since it uses as much as digits as its factorization.

78461011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 78461011 is about 8857.8220234999. The cubic root of 78461011 is about 428.1059855586.

Adding to 78461011 its reverse (11016487), we get a palindrome (89477498).

The spelling of 78461011 in words is "seventy-eight million, four hundred sixty-one thousand, eleven".