1957923634 has 4 divisors (see below), whose sum is σ = 2936885454. Its totient is φ = 978961816.

The previous prime is 1957923631. The next prime is 1957923689. The reversal of 1957923634 is 4363297591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4363297591 = 43 ⋅101472037.

It can be written as a sum of positive squares in only one way, i.e., 1361831409 + 596092225 = 36903^2 + 24415^2 .

It is not an unprimeable number, because it can be changed into a prime (1957923631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489480907 + ... + 489480910.

Almost surely, 2^1957923634 is an apocalyptic number.

1957923634 is a deficient number, since it is larger than the sum of its proper divisors (978961820).

1957923634 is an equidigital number, since it uses as much as digits as its factorization.

1957923634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978961819.

The product of its digits is 1224720, while the sum is 49.

The square root of 1957923634 is about 44248.4308648341. The cubic root of 1957923634 is about 1251.0228713457.

The spelling of 1957923634 in words is "one billion, nine hundred fifty-seven million, nine hundred twenty-three thousand, six hundred thirty-four".