248992691 has 2 divisors, whose sum is σ = 248992692. Its totient is φ = 248992690.

The previous prime is 248992643. The next prime is 248992697. The reversal of 248992691 is 196299842.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 248992691 - 2¹⁰ = 248991667 is a prime.

It is not a weakly prime, because it can be changed into another prime (248992697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124496345 + 124496346.

It is an arithmetic number, because the mean of its divisors is an integer number (124496346).

Almost surely, 2^248992691 is an apocalyptic number.

248992691 is a deficient number, since it is larger than the sum of its proper divisors (1).

248992691 is an equidigital number, since it uses as much as digits as its factorization.

248992691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 248992691 is about 15779.5022418326. The cubic root of 248992691 is about 629.1132994942.

The spelling of 248992691 in words is "two hundred forty-eight million, nine hundred ninety-two thousand, six hundred ninety-one".