1034557991 has 2 divisors, whose sum is σ = 1034557992. Its totient is φ = 1034557990.

The previous prime is 1034557973. The next prime is 1034558081. The reversal of 1034557991 is 1997554301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1034557991 - 2²² = 1030363687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1034557291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 517278995 + 517278996.

It is an arithmetic number, because the mean of its divisors is an integer number (517278996).

Almost surely, 2^1034557991 is an apocalyptic number.

1034557991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1034557991 is an equidigital number, since it uses as much as digits as its factorization.

1034557991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170100, while the sum is 44.

The square root of 1034557991 is about 32164.5455587359. The cubic root of 1034557991 is about 1011.3891257127.

The spelling of 1034557991 in words is "one billion, thirty-four million, five hundred fifty-seven thousand, nine hundred ninety-one".