354240691 has 4 divisors (see below), whose sum is σ = 404846512. Its totient is φ = 303634872.

The previous prime is 354240673. The next prime is 354240707. The reversal of 354240691 is 196042453.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196042453 = 17 ⋅11531909.

It is a cyclic number.

It is not a de Polignac number, because 354240691 - 2⁷ = 354240563 is a prime.

It is a super-3 number, since 3×354240691³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (354240671) 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, 25302900 + ... + 25302913.

It is an arithmetic number, because the mean of its divisors is an integer number (101211628).

Almost surely, 2^354240691 is an apocalyptic number.

354240691 is a deficient number, since it is larger than the sum of its proper divisors (50605821).

354240691 is an equidigital number, since it uses as much as digits as its factorization.

354240691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50605820.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 354240691 is about 18821.2829265170. The cubic root of 354240691 is about 707.5646848674.

The spelling of 354240691 in words is "three hundred fifty-four million, two hundred forty thousand, six hundred ninety-one".