908238769 has 3 divisors (see below), whose sum is σ = 908268907. Its totient is φ = 908208632.

The previous prime is 908238761. The next prime is 908238781. The reversal of 908238769 is 967832809.

The square root of 908238769 is 30137.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 835903744 = 8505^2 + 28912^2 .

It is not a de Polignac number, because 908238769 - 2³ = 908238761 is a prime.

It is a super-2 number, since 2×908238769² = 1649795323029270722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (908238761) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15069 + ... + 45205.

Almost surely, 2^908238769 is an apocalyptic number.

908238769 is the 30137-th square number.

908238769 is the 15069-th centered octagonal number.

It is an amenable number.

908238769 is a deficient number, since it is larger than the sum of its proper divisors (30138).

908238769 is an frugal number, since it uses more digits than its factorization.

908238769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60274 (or 30137 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The cubic root of 908238769 is about 968.4265307335.

The spelling of 908238769 in words is "nine hundred eight million, two hundred thirty-eight thousand, seven hundred sixty-nine".