621069814 has 4 divisors (see below), whose sum is σ = 931604724. Its totient is φ = 310534906.

The previous prime is 621069811. The next prime is 621069859. The reversal of 621069814 is 418960126.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621069811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155267452 + ... + 155267455.

It is an arithmetic number, because the mean of its divisors is an integer number (232901181).

Almost surely, 2^621069814 is an apocalyptic number.

621069814 is a deficient number, since it is larger than the sum of its proper divisors (310534910).

621069814 is a wasteful number, since it uses less digits than its factorization.

621069814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310534909.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 621069814 is about 24921.2723190450. The cubic root of 621069814 is about 853.1920640504.

The spelling of 621069814 in words is "six hundred twenty-one million, sixty-nine thousand, eight hundred fourteen".