351478661 has 2 divisors, whose sum is σ = 351478662. Its totient is φ = 351478660.

The previous prime is 351478619. The next prime is 351478733. The reversal of 351478661 is 166874153.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313113025 + 38365636 = 17695^2 + 6194^2 .

It is a cyclic number.

It is not a de Polignac number, because 351478661 - 2²⁶ = 284369797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351478601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175739330 + 175739331.

It is an arithmetic number, because the mean of its divisors is an integer number (175739331).

Almost surely, 2^351478661 is an apocalyptic number.

It is an amenable number.

351478661 is a deficient number, since it is larger than the sum of its proper divisors (1).

351478661 is an equidigital number, since it uses as much as digits as its factorization.

351478661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 351478661 is about 18747.7641600272. The cubic root of 351478661 is about 705.7209137198.

The spelling of 351478661 in words is "three hundred fifty-one million, four hundred seventy-eight thousand, six hundred sixty-one".