619980631 has 4 divisors (see below), whose sum is σ = 622688200. Its totient is φ = 617273064.

The previous prime is 619980629. The next prime is 619980649. The reversal of 619980631 is 136089916.

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 619980631 - 2¹ = 619980629 is a prime.

It is a super-2 number, since 2×619980631² = 768751965630316322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619980661) 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, 1353441 + ... + 1353898.

It is an arithmetic number, because the mean of its divisors is an integer number (155672050).

Almost surely, 2^619980631 is an apocalyptic number.

619980631 is a deficient number, since it is larger than the sum of its proper divisors (2707569).

619980631 is a wasteful number, since it uses less digits than its factorization.

619980631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707568.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 619980631 is about 24899.4102540602. The cubic root of 619980631 is about 852.6930186749.

The spelling of 619980631 in words is "six hundred nineteen million, nine hundred eighty thousand, six hundred thirty-one".