201970087 has 16 divisors (see below), whose sum is σ = 226929312. Its totient is φ = 178139520.

The previous prime is 201970037. The next prime is 201970147. The reversal of 201970087 is 780079102.

It is a cyclic number.

It is not a de Polignac number, because 201970087 - 2²⁷ = 67752359 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 (201970037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275173 + ... + 275905.

It is an arithmetic number, because the mean of its divisors is an integer number (14183082).

Almost surely, 2^201970087 is an apocalyptic number.

201970087 is a deficient number, since it is larger than the sum of its proper divisors (24959225).

201970087 is a wasteful number, since it uses less digits than its factorization.

201970087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 201970087 is about 14211.6180289227. The cubic root of 201970087 is about 586.7174667974.

The spelling of 201970087 in words is "two hundred one million, nine hundred seventy thousand, eighty-seven".