354420909 has 6 divisors (see below), whose sum is σ = 511941326. Its totient is φ = 236280600.

The previous prime is 354420907. The next prime is 354420931. The reversal of 354420909 is 909024453.

354420909 is a `hidden beast` number, since 3 + 544 + 20 + 90 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 282340809 + 72080100 = 16803^2 + 8490^2 .

It is not a de Polignac number, because 354420909 - 2¹ = 354420907 is a prime.

It is a super-2 number, since 2×354420909² = 251228361472772562, 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 (354420907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19690042 + ... + 19690059.

Almost surely, 2^354420909 is an apocalyptic number.

It is an amenable number.

354420909 is a deficient number, since it is larger than the sum of its proper divisors (157520417).

354420909 is a wasteful number, since it uses less digits than its factorization.

354420909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39380107 (or 39380104 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 354420909 is about 18826.0699297543. The cubic root of 354420909 is about 707.6846544035.

The spelling of 354420909 in words is "three hundred fifty-four million, four hundred twenty thousand, nine hundred nine".