1597150138 has 4 divisors (see below), whose sum is σ = 2395725210. Its totient is φ = 798575068.

The previous prime is 1597150133. The next prime is 1597150211. The reversal of 1597150138 is 8310517951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8310517951 = 211 ⋅39386341.

It can be written as a sum of positive squares in only one way, i.e., 1596561849 + 588289 = 39957^2 + 767^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1597150138.

It is not an unprimeable number, because it can be changed into a prime (1597150133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399287533 + ... + 399287536.

Almost surely, 2^1597150138 is an apocalyptic number.

1597150138 is a deficient number, since it is larger than the sum of its proper divisors (798575072).

1597150138 is an equidigital number, since it uses as much as digits as its factorization.

1597150138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798575071.

The product of its (nonzero) digits is 37800, while the sum is 40.

The square root of 1597150138 is about 39964.3608481357. The cubic root of 1597150138 is about 1168.9122619978.

The spelling of 1597150138 in words is "one billion, five hundred ninety-seven million, one hundred fifty thousand, one hundred thirty-eight".