81069454 has 8 divisors (see below), whose sum is σ = 124191648. Its totient is φ = 39672240.

The previous prime is 81069451. The next prime is 81069463. The reversal of 81069454 is 45496018.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81069451) 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, 431127 + ... + 431314.

It is an arithmetic number, because the mean of its divisors is an integer number (15523956).

Almost surely, 2^81069454 is an apocalyptic number.

81069454 is a deficient number, since it is larger than the sum of its proper divisors (43122194).

81069454 is a wasteful number, since it uses less digits than its factorization.

81069454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862490.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 81069454 is about 9003.8577287738. The cubic root of 81069454 is about 432.7985024315.

The spelling of 81069454 in words is "eighty-one million, sixty-nine thousand, four hundred fifty-four".