901949109 has 16 divisors (see below), whose sum is σ = 1223973888. Its totient is φ = 590662512.

The previous prime is 901949099. The next prime is 901949149.

901949109 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 901949109 - 2¹⁶ = 901883573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901949149) 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, 67654 + ... + 79880.

It is an arithmetic number, because the mean of its divisors is an integer number (76498368).

Almost surely, 2^901949109 is an apocalyptic number.

It is an amenable number.

901949109 is a deficient number, since it is larger than the sum of its proper divisors (322024779).

901949109 is a wasteful number, since it uses less digits than its factorization.

901949109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12664.

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 901949109 is about 30032.4675809365. The cubic root of 901949109 is about 966.1858613436.

The spelling of 901949109 in words is "nine hundred one million, nine hundred forty-nine thousand, one hundred nine".