81733007 has 8 divisors (see below), whose sum is σ = 85392384. Its totient is φ = 78082488.

The previous prime is 81732997. The next prime is 81733027. The reversal of 81733007 is 70033718.

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 81733007 - 2¹⁸ = 81470863 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 (81733027) 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, 22778 + ... + 26120.

It is an arithmetic number, because the mean of its divisors is an integer number (10674048).

Almost surely, 2^81733007 is an apocalyptic number.

81733007 is a deficient number, since it is larger than the sum of its proper divisors (3659377).

81733007 is a wasteful number, since it uses less digits than its factorization.

81733007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4429.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 81733007 is about 9040.6308961267. The cubic root of 81733007 is about 433.9761130645.

The spelling of 81733007 in words is "eighty-one million, seven hundred thirty-three thousand, seven".