11619731 has 2 divisors, whose sum is σ = 11619732. Its totient is φ = 11619730.

The previous prime is 11619703. The next prime is 11619733. The reversal of 11619731 is 13791611.

11619731 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (13791611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11619731 - 2¹⁸ = 11357587 is a prime.

It is a super-2 number, since 2×11619731² = 270036297024722, which contains 22 as substring.

Together with 11619733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11619694 and 11619703.

It is not a weakly prime, because it can be changed into another prime (11619733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5809865 + 5809866.

It is an arithmetic number, because the mean of its divisors is an integer number (5809866).

Almost surely, 2^11619731 is an apocalyptic number.

11619731 is a deficient number, since it is larger than the sum of its proper divisors (1).

11619731 is an equidigital number, since it uses as much as digits as its factorization.

11619731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 29.

The square root of 11619731 is about 3408.7726530234. The cubic root of 11619731 is about 226.4985145128.

The spelling of 11619731 in words is "eleven million, six hundred nineteen thousand, seven hundred thirty-one".