890648819 has 4 divisors (see below), whose sum is σ = 943039944. Its totient is φ = 838257696.

The previous prime is 890648813. The next prime is 890648821. The reversal of 890648819 is 918846098.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890648819 is a prime.

It is a super-2 number, since 2×890648819² = 1586510637572189522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890648813) 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, 26195537 + ... + 26195570.

It is an arithmetic number, because the mean of its divisors is an integer number (235759986).

Almost surely, 2^890648819 is an apocalyptic number.

890648819 is a deficient number, since it is larger than the sum of its proper divisors (52391125).

890648819 is a wasteful number, since it uses less digits than its factorization.

890648819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52391124.

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 890648819 is about 29843.7400303648. The cubic root of 890648819 is about 962.1338598139.

The spelling of 890648819 in words is "eight hundred ninety million, six hundred forty-eight thousand, eight hundred nineteen".