155274947 has 2 divisors, whose sum is σ = 155274948. Its totient is φ = 155274946.

The previous prime is 155274919. The next prime is 155274949. The reversal of 155274947 is 749472551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155274947 - 2⁶ = 155274883 is a prime.

It is a super-2 number, since 2×155274947² = 48220618331705618, which contains 22 as substring.

Together with 155274949, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 155274898 and 155274907.

It is not a weakly prime, because it can be changed into another prime (155274949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77637473 + 77637474.

It is an arithmetic number, because the mean of its divisors is an integer number (77637474).

Almost surely, 2^155274947 is an apocalyptic number.

155274947 is a deficient number, since it is larger than the sum of its proper divisors (1).

155274947 is an equidigital number, since it uses as much as digits as its factorization.

155274947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 44.

The square root of 155274947 is about 12460.9368427900. The cubic root of 155274947 is about 537.4859669673.

The spelling of 155274947 in words is "one hundred fifty-five million, two hundred seventy-four thousand, nine hundred forty-seven".