901801901 has 32 divisors (see below), whose sum is σ = 1218459648. Its totient is φ = 644552640.

The previous prime is 901801861. The next prime is 901801903. The reversal of 901801901 is 109108109.

It is a cyclic number.

It is not a de Polignac number, because 901801901 - 2¹⁰ = 901800877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901801903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160400 + ... + 165926.

It is an arithmetic number, because the mean of its divisors is an integer number (38076864).

Almost surely, 2^901801901 is an apocalyptic number.

901801901 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

901801901 is a deficient number, since it is larger than the sum of its proper divisors (316657747).

901801901 is a wasteful number, since it uses less digits than its factorization.

901801901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5721.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 901801901 is about 30030.0166666620. The cubic root of 901801901 is about 966.1332944358.

The spelling of 901801901 in words is "nine hundred one million, eight hundred one thousand, nine hundred one".