1011603431 has 2 divisors, whose sum is σ = 1011603432. Its totient is φ = 1011603430.

The previous prime is 1011603407. The next prime is 1011603449. The reversal of 1011603431 is 1343061101.

It is a strong prime.

It is an emirp because it is prime and its reverse (1343061101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011603431 is a prime.

It is a super-2 number, since 2×1011603431² = 2046683003221943522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011603401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505801715 + 505801716.

It is an arithmetic number, because the mean of its divisors is an integer number (505801716).

Almost surely, 2^1011603431 is an apocalyptic number.

1011603431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011603431 is an equidigital number, since it uses as much as digits as its factorization.

1011603431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1011603431 is about 31805.7138105718. The cubic root of 1011603431 is about 1003.8529460740.

Adding to 1011603431 its reverse (1343061101), we get a palindrome (2354664532).

The spelling of 1011603431 in words is "one billion, eleven million, six hundred three thousand, four hundred thirty-one".