72731702 has 4 divisors (see below), whose sum is σ = 109097556. Its totient is φ = 36365850.

The previous prime is 72731689. The next prime is 72731707. The reversal of 72731702 is 20713727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20713727 = 151 ⋅137177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72731707) 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, 18182924 + ... + 18182927.

It is an arithmetic number, because the mean of its divisors is an integer number (27274389).

Almost surely, 2^72731702 is an apocalyptic number.

72731702 is a deficient number, since it is larger than the sum of its proper divisors (36365854).

72731702 is a wasteful number, since it uses less digits than its factorization.

72731702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36365853.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 72731702 is about 8528.2883394032. The cubic root of 72731702 is about 417.4212781404.

The spelling of 72731702 in words is "seventy-two million, seven hundred thirty-one thousand, seven hundred two".