201407391 has 64 divisors (see below), whose sum is σ = 329049600. Its totient is φ = 122821920.

The previous prime is 201407383. The next prime is 201407413. The reversal of 201407391 is 193704102.

201407391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201407391 - 2³ = 201407383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201407351) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1537396 + ... + 1537526.

It is an arithmetic number, because the mean of its divisors is an integer number (5141400).

Almost surely, 2^201407391 is an apocalyptic number.

201407391 is a deficient number, since it is larger than the sum of its proper divisors (127642209).

201407391 is an equidigital number, since it uses as much as digits as its factorization.

201407391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 201407391 is about 14191.8071787916. The cubic root of 201407391 is about 586.1720879422.

The spelling of 201407391 in words is "two hundred one million, four hundred seven thousand, three hundred ninety-one".