654091 has 4 divisors (see below), whose sum is σ = 660312. Its totient is φ = 647872.

The previous prime is 654089. The next prime is 654107. The reversal of 654091 is 190456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 654091 - 2¹ = 654089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2950 + ... + 3163.

It is an arithmetic number, because the mean of its divisors is an integer number (165078).

2⁶⁵⁴⁰⁹¹ is an apocalyptic number.

654091 is a deficient number, since it is larger than the sum of its proper divisors (6221).

654091 is a wasteful number, since it uses less digits than its factorization.

654091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 654091 is about 808.7589257622. The cubic root of 654091 is about 86.8052631182.

The spelling of 654091 in words is "six hundred fifty-four thousand, ninety-one".