375186989 has 2 divisors, whose sum is σ = 375186990. Its totient is φ = 375186988.

The previous prime is 375186983. The next prime is 375187009. The reversal of 375186989 is 989681573.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245454889 + 129732100 = 15667^2 + 11390^2 .

It is a cyclic number.

It is not a de Polignac number, because 375186989 - 2⁸ = 375186733 is a prime.

It is a super-2 number, since 2×375186989² = 281530553429772242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (375186983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187593494 + 187593495.

It is an arithmetic number, because the mean of its divisors is an integer number (187593495).

Almost surely, 2^375186989 is an apocalyptic number.

It is an amenable number.

375186989 is a deficient number, since it is larger than the sum of its proper divisors (1).

375186989 is an equidigital number, since it uses as much as digits as its factorization.

375186989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 56.

The square root of 375186989 is about 19369.7441645469. The cubic root of 375186989 is about 721.2446251503.

The spelling of 375186989 in words is "three hundred seventy-five million, one hundred eighty-six thousand, nine hundred eighty-nine".