394977269 has 4 divisors (see below), whose sum is σ = 418211244. Its totient is φ = 371743296.

The previous prime is 394977251. The next prime is 394977277. The reversal of 394977269 is 962779493.

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

It can be written as a sum of positive squares in 2 ways, for example, as 244547044 + 150430225 = 15638^2 + 12265^2 .

It is a cyclic number.

It is not a de Polignac number, because 394977269 - 2¹⁶ = 394911733 is a prime.

It is a super-2 number, since 2×394977269² = 312014086053396722, which 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 (394977299) 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, 11616962 + ... + 11616995.

It is an arithmetic number, because the mean of its divisors is an integer number (104552811).

Almost surely, 2^394977269 is an apocalyptic number.

It is an amenable number.

394977269 is a deficient number, since it is larger than the sum of its proper divisors (23233975).

394977269 is a wasteful number, since it uses less digits than its factorization.

394977269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23233974.

The product of its digits is 5143824, while the sum is 56.

The square root of 394977269 is about 19874.0350457576. The cubic root of 394977269 is about 733.7093173679.

It can be divided in two parts, 3949 and 77269, that added together give a palindrome (81218).

The spelling of 394977269 in words is "three hundred ninety-four million, nine hundred seventy-seven thousand, two hundred sixty-nine".