190900949 has 2 divisors, whose sum is σ = 190900950. Its totient is φ = 190900948.

The previous prime is 190900937. The next prime is 190900967. The reversal of 190900949 is 949009091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127012900 + 63888049 = 11270^2 + 7993^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190900949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190900909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95450474 + 95450475.

It is an arithmetic number, because the mean of its divisors is an integer number (95450475).

Almost surely, 2^190900949 is an apocalyptic number.

It is an amenable number.

190900949 is a deficient number, since it is larger than the sum of its proper divisors (1).

190900949 is an equidigital number, since it uses as much as digits as its factorization.

190900949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 190900949 is about 13816.6909569549. The cubic root of 190900949 is about 575.7969531314.

The spelling of 190900949 in words is "one hundred ninety million, nine hundred thousand, nine hundred forty-nine".