190473988781 has 4 divisors (see below), whose sum is σ = 192323250912. Its totient is φ = 188624726652.

The previous prime is 190473988739. The next prime is 190473988819. The reversal of 190473988781 is 187889374091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 190473988781 - 2¹⁴ = 190473972397 is a prime.

It is a super-2 number, since 2×190473988781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190473988711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924630911 + ... + 924631116.

It is an arithmetic number, because the mean of its divisors is an integer number (48080812728).

Almost surely, 2^190473988781 is an apocalyptic number.

It is an amenable number.

190473988781 is a deficient number, since it is larger than the sum of its proper divisors (1849262131).

190473988781 is a wasteful number, since it uses less digits than its factorization.

190473988781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849262130.

The product of its (nonzero) digits is 24385536, while the sum is 65.

The spelling of 190473988781 in words is "one hundred ninety billion, four hundred seventy-three million, nine hundred eighty-eight thousand, seven hundred eighty-one".