155245379 has 2 divisors, whose sum is σ = 155245380. Its totient is φ = 155245378.

The previous prime is 155245339. The next prime is 155245397. The reversal of 155245379 is 973542551.

Together with next prime (155245397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155245379 is a prime.

It is a super-2 number, since 2×155245379² = 48202255401707282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155245319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77622689 + 77622690.

It is an arithmetic number, because the mean of its divisors is an integer number (77622690).

Almost surely, 2^155245379 is an apocalyptic number.

155245379 is a deficient number, since it is larger than the sum of its proper divisors (1).

155245379 is an equidigital number, since it uses as much as digits as its factorization.

155245379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 41.

The square root of 155245379 is about 12459.7503586549. The cubic root of 155245379 is about 537.4518481472.

The spelling of 155245379 in words is "one hundred fifty-five million, two hundred forty-five thousand, three hundred seventy-nine".