81484007 has 4 divisors (see below), whose sum is σ = 88891656. Its totient is φ = 74076360.

The previous prime is 81484001. The next prime is 81484037. The reversal of 81484007 is 70048418.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81484007 - 2⁴ = 81483991 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 (81484001) 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, 3703808 + ... + 3703829.

It is an arithmetic number, because the mean of its divisors is an integer number (22222914).

Almost surely, 2^81484007 is an apocalyptic number.

81484007 is a deficient number, since it is larger than the sum of its proper divisors (7407649).

81484007 is a wasteful number, since it uses less digits than its factorization.

81484007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7407648.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 81484007 is about 9026.8492288284. The cubic root of 81484007 is about 433.5349613300.

The spelling of 81484007 in words is "eighty-one million, four hundred eighty-four thousand, seven".