890770009 has 4 divisors (see below), whose sum is σ = 890936704. Its totient is φ = 890603316.

The previous prime is 890769973. The next prime is 890770031. The reversal of 890770009 is 900077098.

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 890770009 - 2¹⁵ = 890737241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890770039) 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, 75057 + ... + 86110.

It is an arithmetic number, because the mean of its divisors is an integer number (222734176).

Almost surely, 2^890770009 is an apocalyptic number.

It is an amenable number.

890770009 is a deficient number, since it is larger than the sum of its proper divisors (166695).

890770009 is a wasteful number, since it uses less digits than its factorization.

890770009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166694.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 890770009 is about 29845.7703703557. The cubic root of 890770009 is about 962.1774968090.

The spelling of 890770009 in words is "eight hundred ninety million, seven hundred seventy thousand, nine".