155550379 has 2 divisors, whose sum is σ = 155550380. Its totient is φ = 155550378.

The previous prime is 155550361. The next prime is 155550407. The reversal of 155550379 is 973055551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155550379 - 2⁷ = 155550251 is a prime.

It is not a weakly prime, because it can be changed into another prime (155550779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77775189 + 77775190.

It is an arithmetic number, because the mean of its divisors is an integer number (77775190).

Almost surely, 2^155550379 is an apocalyptic number.

155550379 is a deficient number, since it is larger than the sum of its proper divisors (1).

155550379 is an equidigital number, since it uses as much as digits as its factorization.

155550379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118125, while the sum is 40.

The square root of 155550379 is about 12471.9837636200. The cubic root of 155550379 is about 537.8035828922.

The spelling of 155550379 in words is "one hundred fifty-five million, five hundred fifty thousand, three hundred seventy-nine".