1397961523 has 24 divisors (see below), whose sum is σ = 1685660544. Its totient is φ = 1154764800.

The previous prime is 1397961463. The next prime is 1397961541. The reversal of 1397961523 is 3251697931.

It is not a de Polignac number, because 1397961523 - 2¹³ = 1397953331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397961553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388593 + ... + 392173.

It is an arithmetic number, because the mean of its divisors is an integer number (70235856).

Almost surely, 2^1397961523 is an apocalyptic number.

1397961523 is a deficient number, since it is larger than the sum of its proper divisors (287699021).

1397961523 is a wasteful number, since it uses less digits than its factorization.

1397961523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883 (or 3876 counting only the distinct ones).

The product of its digits is 306180, while the sum is 46.

The square root of 1397961523 is about 37389.3236499405. The cubic root of 1397961523 is about 1118.1457208001.

The spelling of 1397961523 in words is "one billion, three hundred ninety-seven million, nine hundred sixty-one thousand, five hundred twenty-three".