81479037 has 8 divisors (see below), whose sum is σ = 108923904. Its totient is φ = 54176768.

The previous prime is 81479017. The next prime is 81479039. The reversal of 81479037 is 73097418.

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 81479037 - 2⁸ = 81478781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81478986 and 81479004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81479039) 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, 34308 + ... + 36605.

It is an arithmetic number, because the mean of its divisors is an integer number (13615488).

Almost surely, 2^81479037 is an apocalyptic number.

It is an amenable number.

81479037 is a deficient number, since it is larger than the sum of its proper divisors (27444867).

81479037 is a wasteful number, since it uses less digits than its factorization.

81479037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71299.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 81479037 is about 9026.5739347772. The cubic root of 81479037 is about 433.5261468699.

The spelling of 81479037 in words is "eighty-one million, four hundred seventy-nine thousand, thirty-seven".