621434763 has 12 divisors (see below), whose sum is σ = 897973648. Its totient is φ = 414130320.

The previous prime is 621434761. The next prime is 621434783. The reversal of 621434763 is 367434126.

It is a happy number.

It is not a de Polignac number, because 621434763 - 2¹ = 621434761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621434761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14418 + ... + 38088.

Almost surely, 2^621434763 is an apocalyptic number.

621434763 is a deficient number, since it is larger than the sum of its proper divisors (276538885).

621434763 is a wasteful number, since it uses less digits than its factorization.

621434763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26594 (or 26591 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 621434763 is about 24928.5932816114. The cubic root of 621434763 is about 853.3591470497.

Adding to 621434763 its reverse (367434126), we get a palindrome (988868889).

The spelling of 621434763 in words is "six hundred twenty-one million, four hundred thirty-four thousand, seven hundred sixty-three".