1203720631 has 2 divisors, whose sum is σ = 1203720632. Its totient is φ = 1203720630.

The previous prime is 1203720589. The next prime is 1203720641. The reversal of 1203720631 is 1360273021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1203720631 - 2¹⁷ = 1203589559 is a prime.

It is a super-2 number, since 2×1203720631² = 2897886714990076322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1203720596 and 1203720605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203720641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601860315 + 601860316.

It is an arithmetic number, because the mean of its divisors is an integer number (601860316).

Almost surely, 2^1203720631 is an apocalyptic number.

1203720631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203720631 is an equidigital number, since it uses as much as digits as its factorization.

1203720631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1203720631 is about 34694.6772718813. The cubic root of 1203720631 is about 1063.7557028475.

Adding to 1203720631 its reverse (1360273021), we get a palindrome (2563993652).

The spelling of 1203720631 in words is "one billion, two hundred three million, seven hundred twenty thousand, six hundred thirty-one".