1396550137 has 4 divisors (see below), whose sum is σ = 1399775860. Its totient is φ = 1393324416.

The previous prime is 1396550107. The next prime is 1396550149. The reversal of 1396550137 is 7310556931.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 500685376 + 895864761 = 22376^2 + 29931^2 .

It is a cyclic number.

It is not a de Polignac number, because 1396550137 - 2⁷ = 1396550009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1396550137.

It is not an unprimeable number, because it can be changed into a prime (1396550107) 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, 1612212 + ... + 1613077.

It is an arithmetic number, because the mean of its divisors is an integer number (349943965).

Almost surely, 2^1396550137 is an apocalyptic number.

It is an amenable number.

1396550137 is a deficient number, since it is larger than the sum of its proper divisors (3225723).

1396550137 is an equidigital number, since it uses as much as digits as its factorization.

1396550137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225722.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 1396550137 is about 37370.4446989864. Note that the first 3 decimals coincide. The cubic root of 1396550137 is about 1117.7692997077.

The spelling of 1396550137 in words is "one billion, three hundred ninety-six million, five hundred fifty thousand, one hundred thirty-seven".