621995141 has 4 divisors (see below), whose sum is σ = 649038432. Its totient is φ = 594951852.

The previous prime is 621995117. The next prime is 621995149. The reversal of 621995141 is 141599126.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 621995141 - 2¹⁴ = 621978757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 621995095 and 621995104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621995149) 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, 13521611 + ... + 13521656.

It is an arithmetic number, because the mean of its divisors is an integer number (162259608).

Almost surely, 2^621995141 is an apocalyptic number.

It is an amenable number.

621995141 is a deficient number, since it is larger than the sum of its proper divisors (27043291).

621995141 is a wasteful number, since it uses less digits than its factorization.

621995141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27043290.

The product of its digits is 19440, while the sum is 38.

The square root of 621995141 is about 24939.8304124146. The cubic root of 621995141 is about 853.6155751591.

The spelling of 621995141 in words is "six hundred twenty-one million, nine hundred ninety-five thousand, one hundred forty-one".