361977394 has 4 divisors (see below), whose sum is σ = 542966094. Its totient is φ = 180988696.

The previous prime is 361977367. The next prime is 361977403. The reversal of 361977394 is 493779163.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493779163 = 19 ⋅25988377.

It can be written as a sum of positive squares in only one way, i.e., 347636025 + 14341369 = 18645^2 + 3787^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90494347 + ... + 90494350.

Almost surely, 2^361977394 is an apocalyptic number.

361977394 is a deficient number, since it is larger than the sum of its proper divisors (180988700).

361977394 is a wasteful number, since it uses less digits than its factorization.

361977394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180988699.

The product of its digits is 857304, while the sum is 49.

The square root of 361977394 is about 19025.7035086748. The cubic root of 361977394 is about 712.6787610969.

The spelling of 361977394 in words is "three hundred sixty-one million, nine hundred seventy-seven thousand, three hundred ninety-four".