155994793 has 2 divisors, whose sum is σ = 155994794. Its totient is φ = 155994792.

The previous prime is 155994781. The next prime is 155994823. The reversal of 155994793 is 397499551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153958464 + 2036329 = 12408^2 + 1427^2 .

It is a cyclic number.

It is not a de Polignac number, because 155994793 - 2¹³ = 155986601 is a prime.

It is a super-2 number, since 2×155994793² = 48668750886225698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155994793.

It is not a weakly prime, because it can be changed into another prime (155994593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77997396 + 77997397.

It is an arithmetic number, because the mean of its divisors is an integer number (77997397).

Almost surely, 2^155994793 is an apocalyptic number.

It is an amenable number.

155994793 is a deficient number, since it is larger than the sum of its proper divisors (1).

155994793 is an equidigital number, since it uses as much as digits as its factorization.

155994793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530900, while the sum is 52.

The square root of 155994793 is about 12489.7875482332. The cubic root of 155994793 is about 538.3152717429.

The spelling of 155994793 in words is "one hundred fifty-five million, nine hundred ninety-four thousand, seven hundred ninety-three".