1656742093 has 2 divisors, whose sum is σ = 1656742094. Its totient is φ = 1656742092.

The previous prime is 1656742039. The next prime is 1656742103. The reversal of 1656742093 is 3902476561.

Together with previous prime (1656742039) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1648522404 + 8219689 = 40602^2 + 2867^2 .

It is an emirp because it is prime and its reverse (3902476561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1656742093 - 2¹³ = 1656733901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1656742013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828371046 + 828371047.

It is an arithmetic number, because the mean of its divisors is an integer number (828371047).

Almost surely, 2^1656742093 is an apocalyptic number.

It is an amenable number.

1656742093 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656742093 is an equidigital number, since it uses as much as digits as its factorization.

1656742093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 1656742093 is about 40703.0968477830. The cubic root of 1656742093 is about 1183.2730380880.

The spelling of 1656742093 in words is "one billion, six hundred fifty-six million, seven hundred forty-two thousand, ninety-three".