622540091 has 4 divisors (see below), whose sum is σ = 622596000. Its totient is φ = 622484184.

The previous prime is 622540033. The next prime is 622540099. The reversal of 622540091 is 190045226.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 622540091 - 2¹⁸ = 622277947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622540099) 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, 4931 + ... + 35628.

It is an arithmetic number, because the mean of its divisors is an integer number (155649000).

Almost surely, 2^622540091 is an apocalyptic number.

622540091 is a deficient number, since it is larger than the sum of its proper divisors (55909).

622540091 is a wasteful number, since it uses less digits than its factorization.

622540091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55908.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 622540091 is about 24950.7533152809. The cubic root of 622540091 is about 853.8647957669.

The spelling of 622540091 in words is "six hundred twenty-two million, five hundred forty thousand, ninety-one".