81073401 has 16 divisors (see below), whose sum is σ = 114605568. Its totient is φ = 50889600.

The previous prime is 81073397. The next prime is 81073403. The reversal of 81073401 is 10437018.

It is not a de Polignac number, because 81073401 - 2² = 81073397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81073403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8340 + ... + 15221.

It is an arithmetic number, because the mean of its divisors is an integer number (7162848).

Almost surely, 2^81073401 is an apocalyptic number.

It is an amenable number.

81073401 is a deficient number, since it is larger than the sum of its proper divisors (33532167).

81073401 is a wasteful number, since it uses less digits than its factorization.

81073401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23632.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 81073401 is about 9004.0769099336. The cubic root of 81073401 is about 432.8055261537.

The spelling of 81073401 in words is "eighty-one million, seventy-three thousand, four hundred one".