901900197 has 32 divisors (see below), whose sum is σ = 1497029760. Its totient is φ = 531826560.

The previous prime is 901900193. The next prime is 901900211. The reversal of 901900197 is 791009109.

It is not a de Polignac number, because 901900197 - 2² = 901900193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901900193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30048 + ... + 52025.

It is an arithmetic number, because the mean of its divisors is an integer number (46782180).

Almost surely, 2^901900197 is an apocalyptic number.

It is an amenable number.

901900197 is a deficient number, since it is larger than the sum of its proper divisors (595129563).

901900197 is a wasteful number, since it uses less digits than its factorization.

901900197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82130 (or 82124 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 901900197 is about 30031.6532511948. The cubic root of 901900197 is about 966.1683958581.

The spelling of 901900197 in words is "nine hundred one million, nine hundred thousand, one hundred ninety-seven".