981382451 has 4 divisors (see below), whose sum is σ = 1121579952. Its totient is φ = 841184952.

The previous prime is 981382447. The next prime is 981382499. The reversal of 981382451 is 154283189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154283189 = 139 ⋅1109951.

It is a cyclic number.

It is not a de Polignac number, because 981382451 - 2² = 981382447 is a prime.

It is a super-2 number, since 2×981382451² = 1926223030261534802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 981382399 and 981382408.

It is not an unprimeable number, because it can be changed into a prime (981382411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70098740 + ... + 70098753.

It is an arithmetic number, because the mean of its divisors is an integer number (280394988).

Almost surely, 2^981382451 is an apocalyptic number.

981382451 is a deficient number, since it is larger than the sum of its proper divisors (140197501).

981382451 is a wasteful number, since it uses less digits than its factorization.

981382451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140197500.

The product of its digits is 69120, while the sum is 41.

The square root of 981382451 is about 31327.0242921347. The cubic root of 981382451 is about 993.7552344120.

The spelling of 981382451 in words is "nine hundred eighty-one million, three hundred eighty-two thousand, four hundred fifty-one".