71949975 has 12 divisors (see below), whose sum is σ = 118957416. Its totient is φ = 38373280.

The previous prime is 71949973. The next prime is 71949989. The reversal of 71949975 is 57994917.

It is a happy number.

It is not a de Polignac number, because 71949975 - 2¹ = 71949973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71949971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 479592 + ... + 479741.

It is an arithmetic number, because the mean of its divisors is an integer number (9913118).

Almost surely, 2^71949975 is an apocalyptic number.

71949975 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

71949975 is a deficient number, since it is larger than the sum of its proper divisors (47007441).

71949975 is a wasteful number, since it uses less digits than its factorization.

71949975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959346 (or 959341 counting only the distinct ones).

The product of its digits is 714420, while the sum is 51.

The square root of 71949975 is about 8482.3331106483. Note that the first 3 decimals coincide. The cubic root of 71949975 is about 415.9203939607.

The spelling of 71949975 in words is "seventy-one million, nine hundred forty-nine thousand, nine hundred seventy-five".