697744421447 has 4 divisors (see below), whose sum is σ = 697794708720. Its totient is φ = 697694134176.

The previous prime is 697744421443. The next prime is 697744421489. The reversal of 697744421447 is 744124447796.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 697744421447 - 2² = 697744421443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697744421441) 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, 25122818 + ... + 25150575.

It is an arithmetic number, because the mean of its divisors is an integer number (174448677180).

Almost surely, 2^697744421447 is an apocalyptic number.

697744421447 is a deficient number, since it is larger than the sum of its proper divisors (50287273).

697744421447 is a wasteful number, since it uses less digits than its factorization.

697744421447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50287272.

The product of its digits is 37933056, while the sum is 59.

The spelling of 697744421447 in words is "six hundred ninety-seven billion, seven hundred forty-four million, four hundred twenty-one thousand, four hundred forty-seven".