71772143 has 8 divisors (see below), whose sum is σ = 73746960. Its totient is φ = 69822720.

The previous prime is 71772137. The next prime is 71772157. The reversal of 71772143 is 34127717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71772143 - 2²⁶ = 4663279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71972143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548 + ... + 11993.

It is an arithmetic number, because the mean of its divisors is an integer number (9218370).

Almost surely, 2^71772143 is an apocalyptic number.

71772143 is a deficient number, since it is larger than the sum of its proper divisors (1974817).

71772143 is a wasteful number, since it uses less digits than its factorization.

71772143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12697.

The product of its digits is 8232, while the sum is 32.

The square root of 71772143 is about 8471.8441321828. The cubic root of 71772143 is about 415.5774474626.

The spelling of 71772143 in words is "seventy-one million, seven hundred seventy-two thousand, one hundred forty-three".