71861950 has 12 divisors (see below), whose sum is σ = 133663320. Its totient is φ = 28744760.

The previous prime is 71861947. The next prime is 71861953. The reversal of 71861950 is 5916817.

It is an interprime number because it is at equal distance from previous prime (71861947) and next prime (71861953).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71861953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 718570 + ... + 718669.

It is an arithmetic number, because the mean of its divisors is an integer number (11138610).

Almost surely, 2^71861950 is an apocalyptic number.

71861950 is a deficient number, since it is larger than the sum of its proper divisors (61801370).

71861950 is a wasteful number, since it uses less digits than its factorization.

71861950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437251 (or 1437246 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 71861950 is about 8477.1427969570. The cubic root of 71861950 is about 415.7507097081.

The spelling of 71861950 in words is "seventy-one million, eight hundred sixty-one thousand, nine hundred fifty".