78461023 has 2 divisors, whose sum is σ = 78461024. Its totient is φ = 78461022.

The previous prime is 78461021. The next prime is 78461029. The reversal of 78461023 is 32016487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78461023 - 2¹ = 78461021 is a prime.

It is a super-2 number, since 2×78461023² = 12312264260413058, which contains 22 as substring.

Together with 78461021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78461021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39230511 + 39230512.

It is an arithmetic number, because the mean of its divisors is an integer number (39230512).

Almost surely, 2^78461023 is an apocalyptic number.

78461023 is a deficient number, since it is larger than the sum of its proper divisors (1).

78461023 is an equidigital number, since it uses as much as digits as its factorization.

78461023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 78461023 is about 8857.8227008673. The cubic root of 78461023 is about 428.1060073838.

The spelling of 78461023 in words is "seventy-eight million, four hundred sixty-one thousand, twenty-three".