1396998425 has 6 divisors (see below), whose sum is σ = 1732278078. Its totient is φ = 1117598720.

The previous prime is 1396998419. The next prime is 1396998431. The reversal of 1396998425 is 5248996931.

It is an interprime number because it is at equal distance from previous prime (1396998419) and next prime (1396998431).

It can be written as a sum of positive squares in 3 ways, for example, as 2050624 + 1394947801 = 1432^2 + 37349^2 .

It is not a de Polignac number, because 1396998425 - 2²² = 1392804121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27939944 + ... + 27939993.

It is an arithmetic number, because the mean of its divisors is an integer number (288713013).

Almost surely, 2^1396998425 is an apocalyptic number.

It is an amenable number.

1396998425 is a deficient number, since it is larger than the sum of its proper divisors (335279653).

1396998425 is an equidigital number, since it uses as much as digits as its factorization.

1396998425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55879947 (or 55879942 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 56.

The square root of 1396998425 is about 37376.4421126463. The cubic root of 1396998425 is about 1117.8888870023. Note that the first 5 decimals are identical.

The spelling of 1396998425 in words is "one billion, three hundred ninety-six million, nine hundred ninety-eight thousand, four hundred twenty-five".