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1231319 is a prime number
BaseRepresentation
bin100101100100111010111
32022120001102
410230213113
5303400234
642220315
713315565
oct4544727
92276042
101231319
11771121
124b469b
133415bb
14240a35
15194c7e
hex12c9d7

1231319 has 2 divisors, whose sum is σ = 1231320. Its totient is φ = 1231318.

The previous prime is 1231313. The next prime is 1231337. The reversal of 1231319 is 9131321.

It is a weak prime.

It is an emirp because it is prime and its reverse (9131321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231319 - 24 = 1231303 is a prime.

It is a super-2 number, since 2×12313192 = 3032292959522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615659 + 615660.

It is an arithmetic number, because the mean of its divisors is an integer number (615660).

21231319 is an apocalyptic number.

1231319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231319 is an equidigital number, since it uses as much as digits as its factorization.

1231319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

The square root of 1231319 is about 1109.6481424307. The cubic root of 1231319 is about 107.1824122312.

The spelling of 1231319 in words is "one million, two hundred thirty-one thousand, three hundred nineteen".