351872489 has 2 divisors, whose sum is σ = 351872490. Its totient is φ = 351872488.

The previous prime is 351872471. The next prime is 351872491. The reversal of 351872489 is 984278153.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 327320464 + 24552025 = 18092^2 + 4955^2 .

It is a cyclic number.

It is not a de Polignac number, because 351872489 - 2¹² = 351868393 is a prime.

Together with 351872491, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_18898562 and since 351872489 and 18898562 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (351872089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175936244 + 175936245.

It is an arithmetic number, because the mean of its divisors is an integer number (175936245).

Almost surely, 2^351872489 is an apocalyptic number.

It is an amenable number.

351872489 is a deficient number, since it is larger than the sum of its proper divisors (1).

351872489 is an equidigital number, since it uses as much as digits as its factorization.

351872489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 351872489 is about 18758.2645519248. The cubic root of 351872489 is about 705.9843995247.

The spelling of 351872489 in words is "three hundred fifty-one million, eight hundred seventy-two thousand, four hundred eighty-nine".