81026479 has 2 divisors, whose sum is σ = 81026480. Its totient is φ = 81026478.

The previous prime is 81026459. The next prime is 81026489. The reversal of 81026479 is 97462018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81026479 - 2²³ = 72637871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81026419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40513239 + 40513240.

It is an arithmetic number, because the mean of its divisors is an integer number (40513240).

Almost surely, 2^81026479 is an apocalyptic number.

81026479 is a deficient number, since it is larger than the sum of its proper divisors (1).

81026479 is an equidigital number, since it uses as much as digits as its factorization.

81026479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 81026479 is about 9001.4709353527. The cubic root of 81026479 is about 432.7220132722.

The spelling of 81026479 in words is "eighty-one million, twenty-six thousand, four hundred seventy-nine".