1397488501509 has 4 divisors (see below), whose sum is σ = 1863318002016. Its totient is φ = 931659001004.

The previous prime is 1397488501489. The next prime is 1397488501571. The reversal of 1397488501509 is 9051058847931.

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.

It is a cyclic number.

It is not a de Polignac number, because 1397488501509 - 2⁵ = 1397488501477 is a prime.

It is a super-2 number, since 2×1397488501509² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397488509509) 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, 232914750249 + ... + 232914750254.

It is an arithmetic number, because the mean of its divisors is an integer number (465829500504).

Almost surely, 2^{1397488501509} is an apocalyptic number.

It is an amenable number.

1397488501509 is a deficient number, since it is larger than the sum of its proper divisors (465829500507).

1397488501509 is an equidigital number, since it uses as much as digits as its factorization.

1397488501509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465829500506.

The product of its (nonzero) digits is 10886400, while the sum is 60.

The spelling of 1397488501509 in words is "one trillion, three hundred ninety-seven billion, four hundred eighty-eight million, five hundred one thousand, five hundred nine".