981408403 has 2 divisors, whose sum is σ = 981408404. Its totient is φ = 981408402.

The previous prime is 981408391. The next prime is 981408409. The reversal of 981408403 is 304804189.

It is a strong prime.

It is an emirp because it is prime and its reverse (304804189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981408403 - 2¹⁷ = 981277331 is a prime.

It is not a weakly prime, because it can be changed into another prime (981408409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490704201 + 490704202.

It is an arithmetic number, because the mean of its divisors is an integer number (490704202).

Almost surely, 2^981408403 is an apocalyptic number.

981408403 is a deficient number, since it is larger than the sum of its proper divisors (1).

981408403 is an equidigital number, since it uses as much as digits as its factorization.

981408403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 981408403 is about 31327.4385004583. The cubic root of 981408403 is about 993.7639940648.

The spelling of 981408403 in words is "nine hundred eighty-one million, four hundred eight thousand, four hundred three".