1890900479 has 4 divisors (see below), whose sum is σ = 2036354376. Its totient is φ = 1745446584.

The previous prime is 1890900461. The next prime is 1890900481. The reversal of 1890900479 is 9740090981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9740090981 = 4337 ⋅2245813.

It is a cyclic number.

It is not a de Polignac number, because 1890900479 - 2⁸ = 1890900223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890900409) 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, 72726929 + ... + 72726954.

It is an arithmetic number, because the mean of its divisors is an integer number (509088594).

Almost surely, 2^1890900479 is an apocalyptic number.

1890900479 is a deficient number, since it is larger than the sum of its proper divisors (145453897).

1890900479 is a wasteful number, since it uses less digits than its factorization.

1890900479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145453896.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 1890900479 is about 43484.4854977037. The cubic root of 1890900479 is about 1236.5819148970.

The spelling of 1890900479 in words is "one billion, eight hundred ninety million, nine hundred thousand, four hundred seventy-nine".