901478987 has 4 divisors (see below), whose sum is σ = 904830480. Its totient is φ = 898127496.

The previous prime is 901478957. The next prime is 901479001. The reversal of 901478987 is 789874109.

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

It is a cyclic number.

It is not a de Polignac number, because 901478987 - 2²⁸ = 633043531 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (901478957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675343 + ... + 1675880.

It is an arithmetic number, because the mean of its divisors is an integer number (226207620).

Almost surely, 2^901478987 is an apocalyptic number.

901478987 is a deficient number, since it is larger than the sum of its proper divisors (3351493).

901478987 is a wasteful number, since it uses less digits than its factorization.

901478987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351492.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 901478987 is about 30024.6396647820. The cubic root of 901478987 is about 966.0179641506.

The spelling of 901478987 in words is "nine hundred one million, four hundred seventy-eight thousand, nine hundred eighty-seven".