742178897 has 2 divisors, whose sum is σ = 742178898. Its totient is φ = 742178896.

The previous prime is 742178891. The next prime is 742178923. The reversal of 742178897 is 798871247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439279681 + 302899216 = 20959^2 + 17404^2 .

It is an emirp because it is prime and its reverse (798871247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 742178897 - 2¹⁰ = 742177873 is a prime.

It is not a weakly prime, because it can be changed into another prime (742178891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371089448 + 371089449.

It is an arithmetic number, because the mean of its divisors is an integer number (371089449).

Almost surely, 2^742178897 is an apocalyptic number.

It is an amenable number.

742178897 is a deficient number, since it is larger than the sum of its proper divisors (1).

742178897 is an equidigital number, since it uses as much as digits as its factorization.

742178897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544, while the sum is 53.

The square root of 742178897 is about 27242.9605035870. The cubic root of 742178897 is about 905.3910571500.

The spelling of 742178897 in words is "seven hundred forty-two million, one hundred seventy-eight thousand, eight hundred ninety-seven".