81463942 has 8 divisors (see below), whose sum is σ = 139652496. Its totient is φ = 34913112.

The previous prime is 81463933. The next prime is 81463951. The reversal of 81463942 is 24936418.

It is an interprime number because it is at equal distance from previous prime (81463933) and next prime (81463951).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2909413 + ... + 2909440.

It is an arithmetic number, because the mean of its divisors is an integer number (17456562).

Almost surely, 2^81463942 is an apocalyptic number.

81463942 is a deficient number, since it is larger than the sum of its proper divisors (58188554).

81463942 is a wasteful number, since it uses less digits than its factorization.

81463942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5818862.

The product of its digits is 41472, while the sum is 37.

The square root of 81463942 is about 9025.7377537795. The cubic root of 81463942 is about 433.4993731884.

The spelling of 81463942 in words is "eighty-one million, four hundred sixty-three thousand, nine hundred forty-two".