82901381 has 8 divisors (see below), whose sum is σ = 84604824. Its totient is φ = 81203200.

The previous prime is 82901369. The next prime is 82901383. The reversal of 82901381 is 18310928.

It can be written as a sum of positive squares in 4 ways, for example, as 68392900 + 14508481 = 8270^2 + 3809^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82901381 is a prime.

It is a super-2 number, since 2×82901381² = 13745277943414322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82901383) 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, 50981 + ... + 52581.

It is an arithmetic number, because the mean of its divisors is an integer number (10575603).

Almost surely, 2^82901381 is an apocalyptic number.

It is an amenable number.

82901381 is a deficient number, since it is larger than the sum of its proper divisors (1703443).

82901381 is a wasteful number, since it uses less digits than its factorization.

82901381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 82901381 is about 9105.0195496770. The cubic root of 82901381 is about 436.0342343991.

The spelling of 82901381 in words is "eighty-two million, nine hundred one thousand, three hundred eighty-one".