354151661 has 2 divisors, whose sum is σ = 354151662. Its totient is φ = 354151660.

The previous prime is 354151649. The next prime is 354151663. The reversal of 354151661 is 166151453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265885636 + 88266025 = 16306^2 + 9395^2 .

It is a cyclic number.

It is not a de Polignac number, because 354151661 - 2⁶ = 354151597 is a prime.

Together with 354151663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354151663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177075830 + 177075831.

It is an arithmetic number, because the mean of its divisors is an integer number (177075831).

Almost surely, 2^354151661 is an apocalyptic number.

It is an amenable number.

354151661 is a deficient number, since it is larger than the sum of its proper divisors (1).

354151661 is an equidigital number, since it uses as much as digits as its factorization.

354151661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 354151661 is about 18818.9176362510. The cubic root of 354151661 is about 707.5054033641.

The spelling of 354151661 in words is "three hundred fifty-four million, one hundred fifty-one thousand, six hundred sixty-one".