71239954 has 4 divisors (see below), whose sum is σ = 106859934. Its totient is φ = 35619976.

The previous prime is 71239951. The next prime is 71239957. The reversal of 71239954 is 45993217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45993217 = 29 ⋅1585973.

It is an interprime number because it is at equal distance from previous prime (71239951) and next prime (71239957).

It can be written as a sum of positive squares in only one way, i.e., 71014329 + 225625 = 8427^2 + 475^2 .

It is not an unprimeable number, because it can be changed into a prime (71239951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17809987 + ... + 17809990.

Almost surely, 2^71239954 is an apocalyptic number.

71239954 is a deficient number, since it is larger than the sum of its proper divisors (35619980).

71239954 is a wasteful number, since it uses less digits than its factorization.

71239954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35619979.

The product of its digits is 68040, while the sum is 40.

The square root of 71239954 is about 8440.3764134072. The cubic root of 71239954 is about 414.5477320024.

The spelling of 71239954 in words is "seventy-one million, two hundred thirty-nine thousand, nine hundred fifty-four".