191400955 has 8 divisors (see below), whose sum is σ = 235022832. Its totient is φ = 149559648.

The previous prime is 191400949. The next prime is 191400971. The reversal of 191400955 is 559004191.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 191400955 - 2⁷ = 191400827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191400955.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444904 + ... + 445333.

It is an arithmetic number, because the mean of its divisors is an integer number (29377854).

Almost surely, 2^191400955 is an apocalyptic number.

191400955 is a deficient number, since it is larger than the sum of its proper divisors (43621877).

191400955 is an equidigital number, since it uses as much as digits as its factorization.

191400955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890285.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 191400955 is about 13834.7733989394. The cubic root of 191400955 is about 576.2992222248.

The spelling of 191400955 in words is "one hundred ninety-one million, four hundred thousand, nine hundred fifty-five".