1390534237 has 4 divisors (see below), whose sum is σ = 1391602720. Its totient is φ = 1389465756.

The previous prime is 1390534231. The next prime is 1390534273. The reversal of 1390534237 is 7324350931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7324350931 = 251 ⋅29180681.

It is a cyclic number.

It is not a de Polignac number, because 1390534237 - 2¹¹ = 1390532189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1390534196 and 1390534205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390534231) 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, 532287 + ... + 534892.

It is an arithmetic number, because the mean of its divisors is an integer number (347900680).

Almost surely, 2^1390534237 is an apocalyptic number.

It is an amenable number.

1390534237 is a deficient number, since it is larger than the sum of its proper divisors (1068483).

1390534237 is a wasteful number, since it uses less digits than its factorization.

1390534237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068482.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 1390534237 is about 37289.8677525142. The cubic root of 1390534237 is about 1116.1619897028.

The spelling of 1390534237 in words is "one billion, three hundred ninety million, five hundred thirty-four thousand, two hundred thirty-seven".