1355497807 has 2 divisors, whose sum is σ = 1355497808. Its totient is φ = 1355497806.

The previous prime is 1355497769. The next prime is 1355497859. The reversal of 1355497807 is 7087945531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355497807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355494807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677748903 + 677748904.

It is an arithmetic number, because the mean of its divisors is an integer number (677748904).

Almost surely, 2^1355497807 is an apocalyptic number.

1355497807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355497807 is an equidigital number, since it uses as much as digits as its factorization.

1355497807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The square root of 1355497807 is about 36817.0858026542. The cubic root of 1355497807 is about 1106.7077208222.

The spelling of 1355497807 in words is "one billion, three hundred fifty-five million, four hundred ninety-seven thousand, eight hundred seven".