621093311 has 4 divisors (see below), whose sum is σ = 648097392. Its totient is φ = 594089232.

The previous prime is 621093307. The next prime is 621093397. The reversal of 621093311 is 113390126.

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 621093311 - 2² = 621093307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621093611) 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, 13502006 + ... + 13502051.

It is an arithmetic number, because the mean of its divisors is an integer number (162024348).

Almost surely, 2^621093311 is an apocalyptic number.

621093311 is a deficient number, since it is larger than the sum of its proper divisors (27004081).

621093311 is a wasteful number, since it uses less digits than its factorization.

621093311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27004080.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 621093311 is about 24921.7437391528. The cubic root of 621093311 is about 853.2028235500.

The spelling of 621093311 in words is "six hundred twenty-one million, ninety-three thousand, three hundred eleven".