71653994 has 8 divisors (see below), whose sum is σ = 107518080. Its totient is φ = 35814636.

The previous prime is 71653979. The next prime is 71653999. The reversal of 71653994 is 49935617.

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

It is not an unprimeable number, because it can be changed into a prime (71653999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5417 + ... + 13139.

It is an arithmetic number, because the mean of its divisors is an integer number (13439760).

Almost surely, 2^71653994 is an apocalyptic number.

71653994 is a deficient number, since it is larger than the sum of its proper divisors (35864086).

71653994 is a wasteful number, since it uses less digits than its factorization.

71653994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12364.

The product of its digits is 204120, while the sum is 44.

The square root of 71653994 is about 8464.8682210652. The cubic root of 71653994 is about 415.3492854637.

The spelling of 71653994 in words is "seventy-one million, six hundred fifty-three thousand, nine hundred ninety-four".