981401027 has 4 divisors (see below), whose sum is σ = 981618840. Its totient is φ = 981183216.

The previous prime is 981401023. The next prime is 981401033. The reversal of 981401027 is 720104189.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 981401027 - 2² = 981401023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 981400984 and 981401002.

It is not an unprimeable number, because it can be changed into a prime (981401023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102002 + ... + 111207.

It is an arithmetic number, because the mean of its divisors is an integer number (245404710).

Almost surely, 2^981401027 is an apocalyptic number.

981401027 is a deficient number, since it is larger than the sum of its proper divisors (217813).

981401027 is a wasteful number, since it uses less digits than its factorization.

981401027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217812.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 981401027 is about 31327.3207759617. The cubic root of 981401027 is about 993.7615044381.

The spelling of 981401027 in words is "nine hundred eighty-one million, four hundred one thousand, twenty-seven".