1906340554 has 4 divisors (see below), whose sum is σ = 2859510834. Its totient is φ = 953170276.

The previous prime is 1906340537. The next prime is 1906340591. The reversal of 1906340554 is 4550436091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4550436091 = 31 ⋅146788261.

It can be written as a sum of positive squares in only one way, i.e., 1594005625 + 312334929 = 39925^2 + 17673^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 476585137 + ... + 476585140.

Almost surely, 2^1906340554 is an apocalyptic number.

1906340554 is a deficient number, since it is larger than the sum of its proper divisors (953170280).

1906340554 is an equidigital number, since it uses as much as digits as its factorization.

1906340554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953170279.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1906340554 is about 43661.6600005085. The cubic root of 1906340554 is about 1239.9385492440.

The spelling of 1906340554 in words is "one billion, nine hundred six million, three hundred forty thousand, five hundred fifty-four".