154813493 has 2 divisors, whose sum is σ = 154813494. Its totient is φ = 154813492.

The previous prime is 154813489. The next prime is 154813511. The reversal of 154813493 is 394318451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153933649 + 879844 = 12407^2 + 938^2 .

It is a cyclic number.

It is not a de Polignac number, because 154813493 - 2² = 154813489 is a prime.

It is a super-2 number, since 2×154813493² = 47934435229722098, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154813403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77406746 + 77406747.

It is an arithmetic number, because the mean of its divisors is an integer number (77406747).

Almost surely, 2^154813493 is an apocalyptic number.

It is an amenable number.

154813493 is a deficient number, since it is larger than the sum of its proper divisors (1).

154813493 is an equidigital number, since it uses as much as digits as its factorization.

154813493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 154813493 is about 12442.4070420478. The cubic root of 154813493 is about 536.9529959193.

The spelling of 154813493 in words is "one hundred fifty-four million, eight hundred thirteen thousand, four hundred ninety-three".