71940729 has 16 divisors (see below), whose sum is σ = 110757248. Its totient is φ = 40684032.

The previous prime is 71940727. The next prime is 71940731. The reversal of 71940729 is 92704917.

It is an interprime number because it is at equal distance from previous prime (71940727) and next prime (71940731).

It is not a de Polignac number, because 71940729 - 2¹ = 71940727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71940721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15622 + ... + 19695.

It is an arithmetic number, because the mean of its divisors is an integer number (6922328).

Almost surely, 2^71940729 is an apocalyptic number.

It is an amenable number.

71940729 is a deficient number, since it is larger than the sum of its proper divisors (38816519).

71940729 is a wasteful number, since it uses less digits than its factorization.

71940729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35424.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 71940729 is about 8481.7880779939. The cubic root of 71940729 is about 415.9025771155.

The spelling of 71940729 in words is "seventy-one million, nine hundred forty thousand, seven hundred twenty-nine".