1009902431 has 2 divisors, whose sum is σ = 1009902432. Its totient is φ = 1009902430.

The previous prime is 1009902419. The next prime is 1009902437. The reversal of 1009902431 is 1342099001.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1342099001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1009902431 - 2¹⁸ = 1009640287 is a prime.

It is a super-2 number, since 2×1009902431² = 2039805840279419522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1009902394 and 1009902403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1009902437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504951215 + 504951216.

It is an arithmetic number, because the mean of its divisors is an integer number (504951216).

Almost surely, 2^1009902431 is an apocalyptic number.

1009902431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009902431 is an equidigital number, since it uses as much as digits as its factorization.

1009902431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1009902431 is about 31778.9620818553. The cubic root of 1009902431 is about 1003.2899745308.

The spelling of 1009902431 in words is "one billion, nine million, nine hundred two thousand, four hundred thirty-one".