195943490 has 16 divisors (see below), whose sum is σ = 362231352. Its totient is φ = 76258944.

The previous prime is 195943487. The next prime is 195943499. The reversal of 195943490 is 94349591.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 194965369 + 978121 = 13963^2 + 989^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (195943499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264419 + ... + 265158.

Almost surely, 2^195943490 is an apocalyptic number.

195943490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195943490 is a deficient number, since it is larger than the sum of its proper divisors (166287862).

195943490 is a wasteful number, since it uses less digits than its factorization.

195943490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529621.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 195943490 is about 13997.9816402223. The cubic root of 195943490 is about 580.8227423982.

The spelling of 195943490 in words is "one hundred ninety-five million, nine hundred forty-three thousand, four hundred ninety".