247488135397 has 4 divisors (see below), whose sum is σ = 249006467680. Its totient is φ = 245969803116.

The previous prime is 247488135373. The next prime is 247488135443. The reversal of 247488135397 is 793531884742.

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 247488135397 - 2⁷ = 247488135269 is a prime.

It is a super-2 number, since 2×247488135397² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247488135497) 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, 759165897 + ... + 759166222.

It is an arithmetic number, because the mean of its divisors is an integer number (62251616920).

Almost surely, 2^247488135397 is an apocalyptic number.

It is an amenable number.

247488135397 is a deficient number, since it is larger than the sum of its proper divisors (1518332283).

247488135397 is a wasteful number, since it uses less digits than its factorization.

247488135397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518332282.

The product of its digits is 40642560, while the sum is 61.

The spelling of 247488135397 in words is "two hundred forty-seven billion, four hundred eighty-eight million, one hundred thirty-five thousand, three hundred ninety-seven".