890978551 has 8 divisors (see below), whose sum is σ = 943791264. Its totient is φ = 838210560.

The previous prime is 890978549. The next prime is 890978573. The reversal of 890978551 is 155879098.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 890978551 - 2¹ = 890978549 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 (890976551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35431 + ... + 55111.

It is an arithmetic number, because the mean of its divisors is an integer number (117973908).

Almost surely, 2^890978551 is an apocalyptic number.

890978551 is a deficient number, since it is larger than the sum of its proper divisors (52812713).

890978551 is a wasteful number, since it uses less digits than its factorization.

890978551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22361.

The product of its (nonzero) digits is 907200, while the sum is 52.

The square root of 890978551 is about 29849.2638267680. The cubic root of 890978551 is about 962.2525774549.

The spelling of 890978551 in words is "eight hundred ninety million, nine hundred seventy-eight thousand, five hundred fifty-one".