890291391 has 16 divisors (see below), whose sum is σ = 1297537920. Its totient is φ = 538500320.

The previous prime is 890291371. The next prime is 890291407. The reversal of 890291391 is 193192098.

890291391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 890291391 - 2⁹ = 890290879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890291321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9705 + ... + 43298.

It is an arithmetic number, because the mean of its divisors is an integer number (81096120).

Almost surely, 2^890291391 is an apocalyptic number.

890291391 is a deficient number, since it is larger than the sum of its proper divisors (407246529).

890291391 is a wasteful number, since it uses less digits than its factorization.

890291391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53526.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 890291391 is about 29837.7511049342. The cubic root of 890291391 is about 962.0051373265.

The spelling of 890291391 in words is "eight hundred ninety million, two hundred ninety-one thousand, three hundred ninety-one".