190704431921 has 2 divisors, whose sum is σ = 190704431922. Its totient is φ = 190704431920.

The previous prime is 190704431867. The next prime is 190704431933. The reversal of 190704431921 is 129134407091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172776560896 + 17927871025 = 415664^2 + 133895^2 .

It is a cyclic number.

It is not a de Polignac number, because 190704431921 - 2¹⁴ = 190704415537 is a prime.

It is a super-2 number, since 2×190704431921² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (190704431941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95352215960 + 95352215961.

It is an arithmetic number, because the mean of its divisors is an integer number (95352215961).

Almost surely, 2^190704431921 is an apocalyptic number.

It is an amenable number.

190704431921 is a deficient number, since it is larger than the sum of its proper divisors (1).

190704431921 is an equidigital number, since it uses as much as digits as its factorization.

190704431921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 190704431921 in words is "one hundred ninety billion, seven hundred four million, four hundred thirty-one thousand, nine hundred twenty-one".