981401023 has 2 divisors, whose sum is σ = 981401024. Its totient is φ = 981401022.

The previous prime is 981400993. The next prime is 981401033. The reversal of 981401023 is 320104189.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (320104189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981401023 - 2⁵ = 981400991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981400982 and 981401000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981401033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490700511 + 490700512.

It is an arithmetic number, because the mean of its divisors is an integer number (490700512).

Almost surely, 2^981401023 is an apocalyptic number.

981401023 is a deficient number, since it is larger than the sum of its proper divisors (1).

981401023 is an equidigital number, since it uses as much as digits as its factorization.

981401023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 981401023 is about 31327.3207121196. The cubic root of 981401023 is about 993.7615030880.

The spelling of 981401023 in words is "nine hundred eighty-one million, four hundred one thousand, twenty-three".